Search is not available for this dataset
query
stringlengths 1
13.4k
| pos
stringlengths 1
61k
| neg
stringlengths 1
63.9k
| query_lang
stringclasses 147
values | __index_level_0__
int64 0
3.11M
|
|---|---|---|---|---|
Chemical stability of some manganese glass-ceramics | The chemical durability of some selected glass-ceramic materials based on the Li2O(MnO,CaO)MgOAl2O3SiO2 glass composition has been determined using the HCl/powder test. The leachability of the glass ceramic was gradually increased by replacing MgO with MnO, while it was decreased by adding MnO instead of CaO. Calcium oxide had a retarding effect on the durability of the material when it was added instead of MgO and/or MnO. The durability of the material was markedly improved by addition of A12O3 in place of Li2O. The leaching values were found to be dependent mainly on the proportion of the glass oxide constituents, i.e., the MgOMnO, CaOMnO and Li2OAl2O3 ratios in the nominal glass compositions. The results were correlated to different views concerning the effect of various ions on the rate of interdiffusion between the glass-ceramic materials and the leaching solution, the types and proportions of the crystalline phases developed, and the residual glass phase. | This paper gives a brief discussion of three problems related to the inter disciplinary aspects of mineralogy: (1) The relationship between the external forms and internal microscopic structures of crystals is traced historically, with special emphasis on calaverite whose indexing difficulty leads to incommensurately modulated structure, a kind of quasiperiodic structure. (2) The real structure (including imperfections and heterogeneous phase) of mineral crystals has been found to be a fertile field and of immense potential for mineralogy. (3) The study of internal periodic structure of opals in the scale of microns gave a first instance of mesoscopic periodic structure, and influenced materials science of the fabrication of photonic crystals and nanostrctures. | eng_Latn | 3,500 |
FABRICATION AND CHARACTERIZATION OF SILICA-ON-SILICON BASED LONG-PERIOD WAVEGUIDE GRATING | Silica-on-silicon based corrugated long-period waveguide grating is fabricated using standard clean- room processes by making periodic corrugation on top of a relatively high-indexed (contrast ≈ 0.8%) Ge-doped silica waveguide that being sandwiched between un-doped silica under-cladding and boro-phospho-silicate-glass over-cladding layers. Resonance of this 15-mm long waveguide grating is found at ~1581 nm at room temperature, with grating strength of ~11 dB and FWHM bandwidth of 7 nm with negligible birefringence. Temperature characteristic of this waveguide grating is also studied. | THIS REPORT STUDIES THE POSSIBILITIES OF USING LIME FOR SOIL STABILIZATION. THE ANALYSIS OF CHANGES IN THE PHYSICO-MECHANICAL PROPERTIES OF SOILS STABILIZED WITH LIME JUSTIFIES THIS TECHNIQUE, SO THAT AN ADEQUATE STABILIZATION METHOD CAN BE SELECTED AND THE OPTIMUM LIME CONTENT DETERMINED. TO REPAIR THE DURAN-BABAHOYO ROAD SECTION (ECUADOR) BUILT ON EXPANSIVE CLAY, THE OKLAHOMA METHOD WAS UTILIZED. THE METHOD USES INJECTION. DETAILS ARE GIVEN OF THE CONSTRUCTION MACHINERY USED AND METHOD OF EXECUTION OF THE WORK. | yue_Hant | 3,501 |
Felsic, Mafic and Intermediate are all types of which natural substance? | felsic and mafic rocks | igneous rock | Britannica.com Felsic and mafic rocks Alternative Titles: acid rock, felsite, silicic rock Related Topics aplite Felsic and mafic rocks, division of igneous rocks on the basis of their silica content. Chemical analyses of the most abundant components in rocks usually are presented as oxides of the elements; igneous rocks typically consist of approximately 12 major oxides totaling over 99 percent of the rock . Of the oxides, silica (SiO2) is usually the most abundant. Because of this abundance and because most igneous minerals are silicates, silica content was used as a basis of early classifications; it remains widely accepted today. Within this scheme, rocks are described as felsic, intermediate, mafic, and ultramafic (in order of decreasing silica content). In a widely accepted silica-content classification scheme, rocks with more than 65 percent silica are called felsic; those with between 55 and 65 percent silica are intermediate ; those with between 45 and 55 percent silica are mafic; and those with less than 45 percent are ultramafic . Compilations of many rock analyses show that rhyolite and granite are felsic, with an average silica content of about 72 percent; syenite , diorite , and monzonite are intermediate, with an average silica content of 59 percent; gabbro and basalt are mafic, with an average silica content of 48 percent; and peridotite is an ultramafic rock, with an average of 41 percent silica. Although there are complete gradations between the averages, rocks tend to cluster about the averages. In general, the gradation from felsic to mafic corresponds to an increase in colour index (dark-mineral percentage). The fine-grained or glassy nature of many volcanic rocks makes a chemical classification such as the felsic-mafic taxonomy very useful in distinguishing the different types. Silica content is especially useful because the density and refractive index of natural glasses have been correlated with silica percentage; this makes identification possible in the absence of chemical data. For similar determinations, glasses can also be prepared in the laboratory from crystalline rocks. Similar Topics | Fujita Scale | Tornado Wiki | Fandom powered by Wikia Share Ad blocker interference detected! Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected. The Fujita scale (F-Scale), or Fujita-Pearson scale, is a scale for rating tornado intensity, based on the damage tornadoes inflict on human-built structures and vegetation. The official Fujita scale category is determined by meteorologists (and engineers) after a ground and/or aerial damage survey; and depending on the circumstances, ground-swirl patterns (cycloidal marks), radar tracking, eyewitness testimonies, media reports and damage imagery, as well as photogrammetry/videogrammetry if motion picture recording is available. F0 40-72 mph Light Damage, some damage to chimneys, branches broken off trees. F1 73-112 mph Moderate Damage, mobile homes overturned, cars pushed off the road. F2 113-157 mph Considerable Damage, mobile homes demolished, roofs torn off homes. F3 158-206 mph Severe Damage, roofs and some walls destroyed, large trees lifted. F4 207-260 mph Devestating Damage, well constructed homes leveled, cars thrown. F5 261-318 mph Incredible Damage, strong homes lifted off foundations and thrown, trees debarked. The Fujita Scale was supported for rating tornadoes until 2007, and was replaced by the Enhanced Fujita Scale in 2007. However, the old Fujita scale is still used in the rest of the world. | eng_Latn | 3,502 |
Slate is an example of what sort of rock, whose name loosely means 'change in form'? | Geologynet - Geology Software, Minerals and Rocks Minerals and Rocks by Longwell, C.R., Knopf, A, Flint, R.F. (1934) CHAPTER 2 INTRODUCTION AND DEFINITION Below a thin, ragged mantle of soil and superficial material, the Earth's outermost shell is made up of rocks Most of these rocks are in turn made up of minerals. As the rocks are the chief documents in which the geologic history of the Earth is written, they be- come deeply interesting when regarded from this point of view. In order to penetrate their meaning and to understand them as historical records we must be able to recognize the minerals that make up the rocks. A mineral is a substance the product of inorganic nature, that is characterized by distinctive physical properties and a composition expressible by a chemical formula. Minerals are composed of chemical elements. A few consist of single elements, such as native gold and silver, as these metals are termed when they occur in elementary state in nature, or diamond and graphite, both of which are crystalline forms of the element carbon. Diamond and graphite illustrate in the most striking way possible what is meant by a mineral. Although both are identical in chemical composition, yet each is a distinct mineral because each has its own characteristic physical properties: diamond is transparent and is the hardest substance known, whereas graphite is opaque and is nearly the softest substance known. Most minerals, however, are made up of two or more chemical elements united in such a way that the product of the union differs greatly in its properties from those of the elements composing it. CHARACTER OF MINERALS CHEMICAL COMPOSITION A few minerals have an invariable chemical composition; but most of them have a variable composition which, however, can be expressed by a chemical formula. Quartz, one of the most abundant minerals, has a fixed composition, expressed by the chemical formula SiO2 2 which is a sort of shorthand saying that one atom of silicon is united with two atoms of oxygen; in short, quartz, regardless of where obtained or how formed, is essentially 100 per cent (silica). Sphalerite from which most of the world's zinc is obtained, is a minera1 of variable composition, which is indicated by writing its formula thus: Zn,FeS thereby indicates g that in this mineral an atom of iron can proxy for an atom of zinc, The various minerals react differently to chemical reagents, and these reactions are one of the means used in identifying minerals. It is beyond the scope of this book to explain how minerals are identified by their chemical behavior, but, many textbooks of mineralogy treat the subject fully. PHYSICAL CHARACTERS Nearly all minerals are crystalline that is to say, they are built up of atoms that are organized in definite geometric arrangements. A few minerals are amorphous (non-crystalline). Under favorable conditions of growth most minerals form crystals A crystal is a solid that is bounded by smooth plane surfaces called faces whose arrangement is governed by the internal structure of the mineral. The crystals of any particular mineral have forms that are more or less characteristic. For instance, the mineral pyrite frequently crystallizes in cubes (Fig. 4). Garnet commonly occur as twelve-sided crystals known 88 dodecahedrons (Fig. 5). The recognition of these crystal forms helps in identifying minerals. Structure of Minerals. The structure of minerals generally refers to their outward shape and form. The following descriptive terms are used, some of which are self-explanatory: crystallized occurring as crystals or showing crystal faces; massive not bounded by crystal faces: the antithesis of crystallized; columnar; fibrous (Fig. 6); botryoidal (Fig. 7), consisting of small rounded forms like closely bunched grapes; micaceous, occurring in thin sheets that can readily be split into thinner sheets; granular, in aggregates of coarse to fine grains; com- pact; earthy; oolitic, formed of small spheres resembling fish roe. Cleavage and Fracture. The manner in which many minerals break or split i | Floreat Salopia - Welcome Floreat Salopia Technology Lesson Plan Welcome Readers Welcome to my blog. My name is Oliver Gough, I am currently a graduate student at Montclair State University studying Masters in Arts in Teaching in Physical Education. I am a native of Shrewsbury, England (See picture left) and studied my undergraduate course, BSc (combined) Health Studies and Exercise Science at Liverpool Univeristy, England. The aim of this blog is to hopefully help me express my views on 21st century topics in teaching as well as learn from others and their opinions. I hope to gain knowledge from my peers and their personal views on the subjects I blog about The heading for my blog "Floreat Salopia" is a motto used in the county I am from in England. The term "Floreat Salopia" is Latin for Let Salop Flourish. Salop was the original name for my hometown of Shrewsbury. So as you enter the town, or see sporting attire and anything associated with the town, the motto "Floreat Salopia" is emblazoned across. Shrewsbury (or Salop) is also the birthplace of the great English naturalist, Charles Darwin. He is most famous for proposing the scientific theory that the branching pattern of evolution resulted from a process called natural selection. Create a free website | eng_Latn | 3,503 |
Minerals that consist of calcium carbonate? | How do you indentify minerals with calcium carbonate? | Why ice is not a mineral? | eng_Latn | 3,504 |
What are the two most aboundent mineral found in earth crust? | What two elements of the earth are most abundantly found in minerals? | What two minerals are in the earth's crust? | eng_Latn | 3,505 |
What is the writing formula for calcium and oxygen? | Calcium plus oxygen equals calcimun oxede formula? | What is the word equation for calcium oxide is added to water? | eng_Latn | 3,506 |
What is been occurring on the surface of thesilicate minerals make up nearly a quarter of the minerals in earth's crust? | What are the 10 minerals that make up the earths crust? | All silicates have which two elements in them? | eng_Latn | 3,507 |
What are four physical properties of a mineral? | List the six physical properties that help identify minerals? | List five physical properties of a mineral? | eng_Latn | 3,508 |
Which mineral family is the most common? | What is the most common group of minerals and what part of the crust do they come from? | Why ice is not a mineral? | eng_Latn | 3,509 |
What minerals do paper towels contain? | Is paper a mineral if not why? | Is paper a mineral if not why? | eng_Latn | 3,510 |
What mineral is ice? | Why ice is not a mineral? | Why ice is not a mineral? | eng_Latn | 3,511 |
What does quartz resist chemical weathering more than any other common material? | Becouse of its quartz resists chemical waethering more than any other common mineral? | Why does chemical weathering your faster in hot wet climates? | eng_Latn | 3,512 |
Calcium carbonate is better known as what? | Precipitated Calcium Carbonate (PCC) Precipitated Calcium Carbonate (PCC) What is PCC — Precipitated Calcium Carbonate? PCC stands for Precipitated Calcium Carbonate—also known as purified, refined or synthetic calcium carbonate. It has the same chemical formula as other types of calcium carbonate, such as limestone, marble and chalk: CaCO3. The calcium, carbon and oxygen atoms can arrange themselves in three different ways, to form three different calcium carbonate minerals. The most common arrangement for both precipitated and ground calcium carbonates is the hexagonal form known as calcite. A number of different calcite crystal forms are possible: scalenohedral, rhombohedral and prismatic. Less common is aragonite, which has a discrete or clustered needle orthorhombic crystal structure. Rare and generally unstable is the vaterite calcium carbonate mineral. Calcium carbonates, including PCC, are considered to be non-toxic. In the U.S., the Food and Drug Administration has Affirmed calcium carbonate to be GRAS (Generally Recognized As Safe). As long as the PCC meets certain purity requirements, it can be used as a direct food additive, as a pharmaceutical or as an indirect additive in paper products that come in contact with food. Similar acceptances and approvals exist around the world where PCCs are widely used in these applications. Click on the Contact Us link below to inquire about specific regulations covering the use of PCCs in these health-related uses, or on the MSDS link to download a Material Safety Data Sheet covering a Specialty Minerals Inc.’s (SMI’s) PCC product. When Did Precipitated Calcium Carbonate (PCC) Manufacture Begin? PCCs have been made commercially for a long time—since 1841. The first producer was the English company, John E. Sturge Ltd., which treated the residual calcium chloride from their potassium chlorate manufacture with soda ash and carbon dioxide to form what they called precipitated chalk. In 1898, a new factory was built in Birmingham using the milk of lime process, which is described in more detail below. This PCC operation is now part of the Performance Minerals group of SMI. PCC production in the U.S. dates from 1938, when the C.K. Williams Company in Adams, Massachusetts, began to make PCC using the limestone from their adjacent mine. This plant was acquired by Pfizer in 1962, and became part of the Performance Minerals group of SMI on the formation of our parent, Minerals Technologies Inc., in 1992. How Is Precipitated Calcium Carbonate (PCC) Made? Almost all PCC is made by direct carbonation of hydrated lime, known as the milk of lime process. The milk of lime process is simple in concept: Mine high purity calcium carbonate rock. Crush the rocks to the particle size needed for processing – small stones or powder. Separate some of the impurities from the crushed rock. Calcine (heat) in a kiln to 1850° F, which takes the calcium carbonate apart, forming lime (CaO) and carbon dioxide gas (CO2). The carbon dioxide can be captured for reuse. CaCO3 + Heat → CaO + CO2 ↑ Add the lime to water to form calcium hydroxide (hydrated lime or slake). CaO + H2O → Ca(OH)2 Separate out additional impurities from the slaked lime. Combine the captured carbon dioxide with the slaked lime. Calcium carbonate reforms, and since it is insoluble in water, precipitates out. Ca(OH)2 + CO2 → CaCO3 ↓ + H2O Separate additional impurities and grit from the PCC slurry. If the PCC is to be used in a paper mill or shipped to a latex paint plant, the lower solids slurry may be used as is, or processed to bring up the solids level, then tested before transfer or shipment. If the PCC is to be used as a dry product, the slurry is dewatered, dried, milled, packaged and tested. While the process is simple on a laboratory scale, making precipitated calcium carbonates commercially on a large scale requires a great deal of process control and process technology to assure the right size, uniformity, shape, surface area and surface chemistry. This body of PCC technology develo | Pepsodent Toothpaste Classic TV Commerial (1948) - YouTube Pepsodent Toothpaste Classic TV Commerial (1948) Want to watch this again later? Sign in to add this video to a playlist. Need to report the video? Sign in to report inappropriate content. The interactive transcript could not be loaded. Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Uploaded on Apr 20, 2011 Early Pepsodent Toothpaste spot. Now with I.M.P. and Irium for tooth decay. "You'll wonder where the yellow went when you brush your teeth with Pepsodent". View tens of thousands more vintage ads at www.adclassix.com. Category | eng_Latn | 3,513 |
By what common name is Calcium Carbonate known? | What is the common name for calcium carbonate? | Reference.com What is the common name for calcium carbonate? A: Quick Answer Calcium carbonate is an element found around the world. Because of this, there are six common names for the element: calcite, chalk, eggshells, limestone, marble and Tums. Full Answer Calcium carbonate can be found in rocks, snails, pearls, and more. Most of it is mined from quarries, and pure sources of calcium carbonate can be extracted and used for foods and pharmaceuticals. It can also be created from calcium oxide. When water is added to calcium oxide, it produces calcium hydroxide. Passing carbon dioxide through calcium hydroxide produces calcium carbonate by means of precipitation, earning it the industry name of precipitated calcium carbonate, or PCC. | Pepsodent Toothpaste Classic TV Commerial (1948) - YouTube Pepsodent Toothpaste Classic TV Commerial (1948) Want to watch this again later? Sign in to add this video to a playlist. Need to report the video? Sign in to report inappropriate content. The interactive transcript could not be loaded. Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Uploaded on Apr 20, 2011 Early Pepsodent Toothpaste spot. Now with I.M.P. and Irium for tooth decay. "You'll wonder where the yellow went when you brush your teeth with Pepsodent". View tens of thousands more vintage ads at www.adclassix.com. Category | eng_Latn | 3,514 |
By what name is hydrated magnesium sulphate better known? | It's Elemental - The Element Magnesium It's Elemental Melting Point: 923 K (650°C or 1202°F) Boiling Point: 1363 K (1090°C or 1994°F) Density: 1.74 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 3 Group Number: 2 Group Name: Alkaline Earth Metal What's in a name? For Magnesia, a district in the region of Thessaly, Greece. Say what? Magnesium is pronounced as mag-NEE-zhi-em. History and Uses: Although it is the eighth most abundant element in the universe and the seventh most abundant element in the earth's crust , magnesium is never found free in nature. Magnesium was first isolated by Sir Humphry Davy, an English chemist, through the electrolysis of a mixture of magnesium oxide (MgO) and mercuric oxide (HgO) in 1808. Today, magnesium can be extracted from the minerals dolomite (CaCO3·MgCO3) and carnallite (KCl·MgCl2·6H2O), but is most often obtained from seawater. Every cubic kilometer of seawater contains about 1.3 billion kilograms of magnesium (12 billion pounds per cubic mile). Magnesium burns with a brilliant white light and is used in pyrotechnics, flares and photographic flashbulbs. Magnesium is the lightest metal that can be used to build things, although its use as a structural material is limited since it burns at relatively low temperatures. Magnesium is frequently alloyed with aluminum , which makes aluminum easier to roll, extrude and weld. Magnesium-aluminum alloys are used where strong, lightweight materials are required, such as in airplanes, missiles and rockets. Cameras, horseshoes, baseball catchers' masks and snowshoes are other items that are made from magnesium alloys. Magnesium oxide (MgO), also known as magnesia, is the second most abundant compound in the earth's crust . Magnesium oxide is used in some antacids, in making crucibles and insulating materials, in refining some metals from their ores and in some types of cements. When combined with water (H2O), magnesia forms magnesium hydroxide (Mg(OH)2), better known as milk of magnesia, which is commonly used as an antacid and as a laxative. Hydrated magnesium sulphate (MgSO4·7H2O), better known as Epsom salt, was discovered in 1618 by a farmer in Epsom, England, when his cows refused to drink the water from a certain mineral well. He tasted the water and found that it tasted very bitter. He also noticed that it helped heal scratches and rashes on his skin. Epsom salt is still used today to treat minor skin abrasions. Other magnesium compounds include magnesium carbonate (MgCO3) and magnesium fluoride (MgF2). Magnesium carbonate is used to make some types of paints and inks and is added to table salt to prevent caking. A thin film of magnesium fluoride is applied to optical lenses to help reduce glare and reflections. Estimated Crustal Abundance: 2.33×104 milligrams per kilogram Estimated Oceanic Abundance: 1.29×103 milligrams per liter Number of Stable Isotopes: 3 ( View all isotope data ) Ionization Energy: 7.646 eV | Mega Annum - How is Mega Annum abbreviated? Mega Annum - How is Mega Annum abbreviated? http://acronyms.thefreedictionary.com/Mega+Annum Mature Audiences (TV program rating) ma Market America (independent entrepenurial corporation founded by James H Ridinger) MA Military Academy (West Point, NY) MA Morocco (ISO country code, top level domain) MA Martial Artist (gaming, Anarchy Online) MA Measurement and Analysis (process area; Capability Maturity Model Integration) MA Magister Artium (Master of Arts) MA Major Arcana (Lineage 2 game armor set) MA Mechanical Animals (Marilyn Manson album) MA Maître Auxiliaire (French: Adjunct Professor) MA Minor Arterial (State highway Information) MA Music Ant (online guide for music software) MA Maître Ès Arts (French: Master of Arts) Ma Mega Annum (one million years, geological chronology) MA Mini Alert (System Sensor Sounder) MA Multi-Alert (system sensor brand name) MA Willys-Overland 1/4 Ton 4 X 4 Truck (1st Model of WWII Jeep) MA Malev Hungarian Airlines Limited - Hungary (IATA airline code) MA MA Monoclonal Antibody Want to thank TFD for its existence? Tell a friend about us , add a link to this page, or visit the webmaster's page for free fun content . Link to this page: Copyright © 2003-2017 Farlex, Inc Disclaimer All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. | eng_Latn | 3,515 |
What is the more common name for gypsum cement? | What is Gypsum? (with pictures) What is Gypsum? Last Modified Date: 29 November 2016 Copyright Protected: Can you see through these real-life optical illusions? Gypsum is the more common name for a mineral compound called calcium sulphate dihydroxide, or sulphate of lime. It is generally found underground near deposits of limestone or other minerals formed by evaporation. One of the most common forms of raw gypsum is a pure white crystal called alabaster . Another unprocessed type forms in desert terrain and its crystals resemble the petals of a flower. For this reason, many people refer to this form of calcium sulphate as the "desert rose." Because the calcium and sulfur molecules in gypsum are chemically bound to water, this material is routinely heated in order to remove 50% to 75% of its original moisture. The resulting powder is called burnt gypsum, although its white or translucent color does not change. This dehydrated form is valued for its ability to solidify almost immediately after water is added to it. It is marketed as the molding agent Plaster of Paris , and is used to make ordinary schoolroom chalk. Another common use for gypsum is the formation of drywall panels. During home construction, these panels are nailed into place to form a finished wall. Gypsum is naturally resistant to fire and heat, which helps it form a barrier between combustible wooden frames and the room itself. These drywall boards can also be cut to size without elaborate tools, making an ideal building material. Gypsum is also used to strengthen soil weakened by too much clay. Gardeners routinely amend weak soil by adding a layer of this material, which does not change the soil's acidity levels. Gypsum-enriched soil can also be used as an alternative to adobe mud, which tends to disintegrate after years of exposure to rainwater. Because of its hardening properties, gypsum is a popular ingredient in cement mixtures. It is also used as a mild abrasive in some toothpastes, since it is considered a non-toxic substance. On Moh's scale of mineral hardness, the compound is considered a 2, harder than talc but softer than limestone. Ad | At Home: A short history of private life: Amazon.co.uk: Bill Bryson: 9780385608275: Books By Dr John the Day Tripper VINE VOICE on 1 Jun. 2010 Format: Hardcover Verified Purchase One of the great things about Bill Bryson's books is his ability to grab your attention and draw you in to find out what odd fact he's going to come up with next. So I hadn't even got through the introduction when he came up with the gem about why all churches in Norfolk appear to have sunk into the churchyard (they haven't; it's the churchyard that has risen 3 ft or more because of the number of bodies buried there, which if you do the maths of how many people live in a parish, how many die each year, and how long the churchyards have been there is not so remarkable. And keep on reading to find out just how many bodies were buried in urban cemeteries in the Victorian era - quite astounding). He is also a great debunker of accepted truths - for instance, there's a lot of interesting comment about the widely accepted view that most food, especially bread, was adulterated with all sorts of disgusting and probably toxic substances. Bryson refers to somebody who tried baking bread with all these supposed adulterants, and showed that what was produced was actually inedible, with the exception of alum, which, he points out, if used in small quantities actually improves bread, and is also used nowadays as an additive to many products. So once again I read this through with great enjoyment and picked up lots of little nuggets of the odd and the interesting. Having said that, however, I did find that I had a sense of deja vu about this book; many of the anecdotes it contains seem to have been recycled from some of his other books (I think that I can recognise quite a lot of them from "Made in America" for example, where they were hung about a framework of American language, rather than around the structure of his wanderings from room to room of his house in Norfolk). Read more › | eng_Latn | 3,516 |
"Which chemical element (atomic number 15) derives its name from the Greek for ""light bearing""?" | Element 15 | Article about Element 15 by The Free Dictionary Element 15 | Article about Element 15 by The Free Dictionary http://encyclopedia2.thefreedictionary.com/Element+15 Related to Element 15: Element 115 , Element 14 , Element 16 , Element 25 phosphorus (fŏs`fərəs) [Gr.,=light-bearing], nonmetallic chemical element; symbol P; at. no. 15; at. wt. 30.97376; m.p. 44.1°C;; b.p. about 280°C;; sp. gr. 1.82 at 20°C;; valence −3, +3, or +5. Solid phosphorus has a tetratomic molecule (P4) with molecular weight 123.8952 atomic mass units (amu). Phosphorus was discovered c.1674 by Hennig Brand of Hamburg, an alchemist, who prepared it from urine. Phosphoric acid was discovered in 1770 by K. W. Scheele and J. G. Gahn in bone ash (see ash ash, in chemistry, solid residue of combustion. The chemical composition of an ash depends on that of the substance burned. Wood ash contains metal carbonates (e.g., potassium carbonate) and oxides formed from metals originally compounded in the wood. ..... Click the link for more information. ); Scheele later isolated phosphorus from bone ash (1774) and produced phosphoric acid by the action of nitric acid on phosphorus (1777). Forms Phosphorus exhibits allotropy allotropy [Gr.,=other form]. A chemical element is said to exhibit allotropy when it occurs in two or more forms in the same physical state; the forms are called allotropes. ..... Click the link for more information. (i.e., it has multiple forms in the same physical state); the physical constants given above are for the common white phosphorus. White phosphorus is an extremely poisonous, yellow to white, waxy, solid substance, nearly insoluble in water but very soluble in carbon disulfide. When exposed to air it ignites spontaneously, burning to form white fumes of phosphorus pentoxide, P2O5. Because of its toxicity and pyrophoric nature, phosphorus is stored underwater. Contact with the skin may cause burns. White phosphorus is phosphorescent (i.e., glows without emitting heat). When white phosphorus is heated to about 250°C; in the absence of air, it changes into the more stable red phosphorus. This form appears as dull, reddish-brown cubic crystals or amorphous powder. Its specific gravity is 2.34. The red form is less dangerous than the white form, but should be handled with caution. It is insoluble in carbon disulfide and most other solvents. It does not ignite unless heated to about 200°C;, does not phosphoresce, and is not poisonous. Another form of phosphorus is black phosphorus, a crystalline electrically conductive material similar to graphite in appearance. It was first prepared by P. W. Bridgman by heating white phosphorus to 200°C; under a pressure of 12,000 atmospheres. Its specific gravity is 2.70. Natural Occurrence and Commercial Preparation Because of its chemical activity phosphorus does not occur uncombined in nature but is widely distributed in many minerals. A major source is apatite apatite , mineral, a phosphate of calcium containing chlorine or fluorine, or both, that is transparent to opaque in shades of green, brown, yellow, white, red, and purple. Apatite is a minor constituent in igneous and metamorphic rocks. ..... Click the link for more information. , an impure calcium phosphate mineral found in phosphate rocks. In the United States major deposits are found in Florida, Tennessee, Montana, and Idaho. White phosphorus is prepared commercially from phosphate rock in an electric furnace or blast furnace. The principal use of phosphorus is in compounds; for this reason, most of the phosphorus produced in furnaces is burned to make phosphorus pentoxide, a white powdery substance. While the pentoxide is used as a drying agent and chemical reagent, it is chiefly converted to phosphoric acid phosphoric acid, any one of three chemical compounds made up of phosphorus, oxygen, and hydrogen (see acids and bases). The most common, orthophosphoric acid, H3PO4, is usually simply called phosphoric acid. ..... Click the link for more information. , H3PO4, also called orthophosphoric acid, by reaction | The Story Of The Storytellers - Q - The Hypothetical Gospel | From Jesus To Christ | FRONTLINE | PBS Elaine H. Pagels: The Harrington Spear Paine Foundation Professor of Religion Princeton University Today there are people who talk about Q as though it's a gospel. Q, as I see it, is not a gospel, it's a hypothesis. When scholars first began to study the gospels of the New Testament, literarily, they discovered that Matthew and Luke both used Mark as the core, sort of the basic story line that they tell. Because Mark is completely incorporated - 16 chapters - into both Matthew and Luke. But they both also used other sayings, parables, and stories and so forth. And scholars observed that there's a part of the sayings in Matthew that are exactly identical with sayings in Luke. In fact they're identical in Greek. Now think -- Jesus spoke Aramaic. So if you were translating Aramaic, and if I were translating Aramaic, they'd come out different, these translations. So you would only have Jesus speaking identical sayings in Greek if you had a written translation in Greek of his sayings. And so scholars suggested that there must have been, besides Mark, something else written down that would have been a list of the sayings of Jesus, translated into Greek. And they called that "Quelle" which means source in German. And they call it for short, "Q." Nobody ever has found this source written. We can reconstruct it because we guess that there was such a written source, but nobody has seen it, and it certainly in my mind is not a gospel. It's a very good and well-founded hypothesis. If it isn't gospel then what is it? It was a source of the sayings of Jesus, and it's another picture of Jesus. For example, whoever collected the sayings of Q wasn't interested in the death of Jesus, wasn't interested in the resurrection of Jesus. They thought the importance of Jesus was what he said, what he preached. Now other people thought, "it's not enough to have the sayings of Jesus. You have to tell about his death and his crucifixion and his resurrection, that's the important thing." Now somebody put that all together and we call it Matthew, and we call it Mark, and we call it Luke. But originally these are probably rather distinct pictures. | eng_Latn | 3,517 |
What element is obtained from bauxite? | what elements are found in the ore bauxite - BINQ Mining BINQ Mining what elements are found in the ore bauxite Posted at:February 17, 2013[ 4.7 - 3871 Ratings] Element found in the ore bauxite? – The Q&A wiki What element is found in a compound called bauxite? aluminum Is bauxite ore commonly found in the US? Bauxite is found in the United States, but most … » More detailed what elements are found in the ore bauxite – Grinding Mill China Element found in the ore bauxite – The Q&A wiki What element is found in a compound called bauxite? aluminum What elements are usually found with gold ore… » More detailed Bauxite – Wikipedia, the free encyclopedia The lateritic bauxites are found mostly in the countries of the … bauxite ore is heated in a pressure vessel along with a sodium hydroxide solution at a temperature … » More detailed bauxite – definition of bauxite by the Free Online Dictionary … bauxite – a clay-like mineral; … aluminum, atomic number 13 – a silvery ductile metallic element found primarily in bauxite. atomic number 31, gallium, … » More detailed What elements are in bauxite? – Yahoo! Answers … Mar 10, 2008 · What elements are in bauxite? 5 years ago; … Bauxite is the most important aluminium ore. … Who found this interesting? » More detailed Mineral Photos – Aluminum & Bauxite | Mineral Information Institute It is the most abundant metallic element, … aluminum metal is never found in … of minerals, bauxite itself is a rock, not a mineral. Bauxite is reddish-brown … » More detailed What metal is obtained from the bauxite ore – The Q&A wiki What metal is obtained from the bauxite ore? In: Geology, Elements and Compounds [Edit categories] Answer: Aluminum. Improve answer. First answer by … » More detailed Bauxite Mineral | Uses and Properties – Rare Earth Elements; Rocks; Rock Tumblers; … What is Bauxite? Bauxite is not a mineral. … Bauxite is found in abundance at many locations around the world. » More detailed Bauxite and Alumina – USGS Mineral Resources Program The principal aluminum hydroxide minerals found in varying proportions with bauxites are gibbsite and the … Mineral Commodity Summaries. Bauxite and … » More detailed Bauxite – ThinkQuest Bauxite is not a mineral, … Mineral identification is based on the ‘sameness’ of the mineral each time a piece is found. For example, … » More detailed Official State Rock – Encyclopedia of Arkansas Bauxite, the most common ore … Although aluminum is the second-most-abundant metal element … state geologist John Branner identified a sample that had been found … » More detailed bauxite (ore) — Britannica Online Encyclopedia Exposed surfaces of lateritic ore are rough, often lavalike, … Bauxite is found in most countries, but the larger deposits occur in the tropics. » More detailed Bauxite – Mine provides mining, gold, copper, coal … Some elements that occur naturally and are minerals are arsenic, bismuth, platinum, gold, silver, … The Mineral, Bauxite, is a major source of Aluminum … » More detailed Bauxite is the principal aluminium ore The mineral bauxite is the starting point for production … Aluminium is the third-most abundant element in the earth’s crust. It is found in different types of minerals. » More detailed Bauxite Mineral,Bauxite Information,Uses of Bauxite,Bauxite … Read about bauxite mineral, bauxite information, uses of … The principal aluminum hydroxide minerals found in varying proportions with bauxites are … » More detailed What element is a lightweight metal extracted from bauxite ore … Jan 08, 2012 · What element is a lightweight metal extracted from bauxite ore and which element is the most abundant element in earths crust? ChaCha… | Chemical Elements.com - Tellurium (Te) Bentor, Yinon. Chemical Element.com - Tellurium. <http://www.chemicalelements.com/elements/te.html>. For more information about citing online sources, please visit the MLA's Website . This page was created by Yinon Bentor. Use of this web site is restricted by this site's license agreement . Copyright © 1996-2012 Yinon Bentor. All Rights Reserved. | eng_Latn | 3,518 |
Which element Atomic Number 19 was originally called Kalium? | It's Elemental - The Element Potassium It's Elemental Melting Point: 336.53 K (63.38°C or 146.08°F) Boiling Point: 1032 K (759°C or 1398°F) Density: 0.89 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 1 Group Name: Alkali Metal What's in a name? From the English word potash. Potassium's chemical symbol comes from the Latin word for alkali, kalium. Say what? Potassium is pronounced as poh-TASS-ee-em. History and Uses: Although potassium is the eighth most abundant element on earth and comprises about 2.1% of the earth's crust, it is a very reactive element and is never found free in nature. Metallic potassium was first isolated by Sir Humphry Davy in 1807 through the electrolysis of molten caustic potash (KOH). A few months after discovering potassium, Davy used the same method to isolate sodium . Potassium can be obtained from the minerals sylvite (KCl), carnallite (KCl·MgCl2·6H2O), langbeinite (K2Mg2(SO4)3) and polyhalite (K2Ca2Mg(SO4)4·2H2O). These minerals are often found in ancient lake and sea beds. Caustic potash, another important source of potassium, is primarily mined in Germany, New Mexico, California and Utah. Pure potassium is a soft, waxy metal that can be easily cut with a knife. It reacts with oxygen to form potassium superoxide (KO2) and with water to form potassium hydroxide (KOH), hydrogen gas and heat. Enough heat is produced to ignite the hydrogen gas. To prevent it from reacting with the oxygen and water in the air, samples of metallic potassium are usually stored submerged in mineral oil. Potassium forms an alloy with sodium (NaK) that is used as a heat transfer medium in some types of nuclear reactors. Potassium forms many important compounds. Potassium chloride (KCl) is the most common potassium compound. It is used in fertilizers, as a salt substitute and to produce other chemicals. Potassium hydroxide (KOH) is used to make soaps, detergents and drain cleaners. Potassium carbonate (KHCO3), also known as pearl ash, is used to make some types of glass and soaps and is obtained commercially as a byproduct of the production of ammonia. Potassium superoxide (KO2) can create oxygen from water vapor (H2O) and carbon dioxide (CO2) through the following reaction: 2KO2 + H2O + 2CO2 => 2KHCO3 + O2. It is used in respiratory equipment and is produced by burning potassium metal in dry air. Potassium nitrate (KNO3), also known as saltpeter or nitre, is used in fertilizers, match heads and pyrotechnics. Estimated Crustal Abundance: 2.09×104 milligrams per kilogram Estimated Oceanic Abundance: 3.99×102 milligrams per liter Number of Stable Isotopes: 2 ( View all isotope data ) Ionization Energy: 4.341 eV | #86 - Radon - Rn Radon 9.73 grams per cubic centimeter Normal Phase From the Latin word nitens, meaning shining Date and Place of Discovery In 1900 in Halle, Germany Discovered by It is one of the heaviest gases. It is considered a health hazard. It exists in the decay of radium. Mineral springs in Misasa , Japan, and Bad Kreuznach , Germany are rich in radium and emit radon. The second most frequent cause of lung cancer behind cigarettes. Common Uses Radon therapy has been used in some spa resorts around the world, but there has never been any proof that there are beneficial effects from radon therapy. Indicator of ground water | eng_Latn | 3,519 |
Two examples of silicate and non-silicate? | What are examples of siliceous mineral rock? | What isnt an example of a fossil fuel? | eng_Latn | 3,520 |
Who discover watch glass? | What is a mineral glass in watches? | What is a mineral glass in watches? | eng_Latn | 3,521 |
The form of a mineral in crust? | What type of minerals are used to make earths crust? | What type of minerals are used to make earths crust? | eng_Latn | 3,522 |
Magma that has a high silica content tends to be? | Does viscosity decrease when silica content in magma decrease? | Does viscosity decrease when silica content in magma decrease? | eng_Latn | 3,523 |
Name the hardest-mineral.? | Is talc the hardest mineral? | Is talc the hardest mineral? | eng_Latn | 3,524 |
How can color of igneous rocks tell you the amount of silica? | Why does the silica content of molten materials affect the color of igneous rocks? | How does the silica content have to do with the color of igneous rocks? | eng_Latn | 3,525 |
A common mineral found in both organic and chemical sedimentary rocks? | What is is a common mineral found in both organic and chemical sedimentary rock? | What is is a common mineral found in both organic and chemical sedimentary rock? | eng_Latn | 3,526 |
A naturally formed solid matter with a crystal structure? | What is a naturally formed substance with a crystal structure? | Is a crystal always a solid? | eng_Latn | 3,527 |
What is the historical importance of minerals? | What is the importance of the argillite rock? | Why ice is not a mineral? | eng_Latn | 3,528 |
Different kinds of minerals in hawaii? | List th minerals founnd in Hawaii? | List th minerals founnd in Hawaii? | eng_Latn | 3,529 |
Which characteristics does all minerals not share? | What is not a characteristic of all minerals? | List five physical properties of a mineral? | eng_Latn | 3,530 |
What is the Chemical name for clay? | What is the solubility of clay? | Why cannot many plants grow in clay soil? | eng_Latn | 3,531 |
What mineral is a battery made of? | What minerals are usedin batteries? | What minerals are usedin batteries? | eng_Latn | 3,532 |
A minerals ability to glow under ultraviolet light? | Special propety of calcite and flourite that causes them to glow under ultraviolet light? | Special propety of calcite and flourite that causes them to glow under ultraviolet light? | eng_Latn | 3,533 |
How does the silica content of molten material affect the color af igneous rocks? | How does the silica content have to do with the color of igneous rocks? | Why does the silica content of molten materials affect the color of igneous rocks? | eng_Latn | 3,534 |
Why have calcium? | How can you get calcium? | What is the diusadvantage of calcium hydrogen carbonate? | eng_Latn | 3,535 |
Calcite is the primary mineral in metamorphic marble . | It is also the primary mineral in metamorphic marble . | The Neolithic tribes built many monuments in the landscape , many of which were megalithic in nature . | eng_Latn | 3,536 |
Its hydroxide was known in pre-modern history as baryta ; this substance does not occur as a mineral , but can be prepared by heating barium carbonate . | Barium sulfate can be used as a pigment , too . | This halocline between the seawater above and the brine below has many bacterial and archaeal cells : they are chemoautotrophs , which feed on ammonia from the brine but can not function without some oxygen . | eng_Latn | 3,537 |
Common rock-forming mafic minerals include olivine , pyroxene , amphibole , and biotite . | Common rock-forming mafic minerals include olivine , pyroxene , amphibole , biotite and other micas , augite and the calcium-rich plagioclase feldspars . | In general , the Piciformes are insectivorous , though the barbets and toucans mostly eat fruit and the honeyguides are unique among birds in digesting beeswax ( though insects make up most of their diet ) . | eng_Latn | 3,538 |
Calcium is a soft gray alkaline earth metal , and is the fifth-most-abundant element by mass in the Earth 's crust . | Calcium is a soft white-gray metal . | Most eggs that are eaten by humans , including bird eggs and turtle eggs , have a protective , oval eggshell , the albumen ( egg white ) , the vitellus ( egg yolk ) , and various thin membranes , that are layers like skin . | eng_Latn | 3,539 |
Pyrite is usually found associated with other sulfides or oxides in quartz veins , sedimentary rock , and metamorphic rock , as well as in coal beds and as a replacement mineral in fossils . | Pyrite is usually found associated with other sulphides or oxides in quartz veins , sedimentary rock , and metamorphic rock , as well as in coal beds , and as a replacement mineral in fossils . | True shrews are not to be confused with West Indies shrews , treeshrews , otter shrews , or elephant shrews , which belong to different families or orders . | eng_Latn | 3,540 |
Sodium nitrate , potassium nitrate , sodium sulfate and iodine are all obtained by the processing of caliche . | Sodium nitrate , also known as caliche , Chile saltpeter , and soda niter , is a chemical compound . | The Naxalite -- Maoist insurgency is an armed conflict in India . It is being fought between Maoist groups , known as Naxalites or Naxals , and the Indian government . | eng_Latn | 3,541 |
Given enough time , these formations can meet and fuse to create columns of calcium carbonate . | Given enough time , these formations can meet . | Cavalera was also involved in a short-lived side project , Nailbomb , and is currently performing with Soulfly and another project , Cavalera Conspiracy . | eng_Latn | 3,542 |
Is fluoride a desirable mineral? | Here's an article on 10 Things you Need to Know about Flouride: http://articles.mercola.com/sites/articles/archive/2013/04/30/water-fluoridation-facts.aspx. Personally, it makes me angry that it is added to our drinking water without our consent. | I don't know specifically, I have. Diamond bright finish. By the way, this particular stopped circulating after two months. I would not recommend it. | eng_Latn | 3,543 |
what is mica in makeup | Mica is a naturally occurring mineral dust often used in makeup foundations, as filler in cement and asphalt, and as insulation material in electric cables. Workers in cosmetic manufacturing factories are at high risk of mica exposure through inhalation.ica minerals are often used as color additives in cosmetics. [2] They also have reflective properties, allowing for a shimmery effect in mineral foundations. | Mica imparts a sparkly white appearance to cosmetics and personal care products. Scientific Facts: Mica is a group of silicate minerals that are widely distributed in different types of rock. Mica often occurs as flakes, scraps, or sheets, and has been used by humans since prehistoric times.he Food and Drug Administration (FDA) lists Mica as a color additive exempt from certification. Mica, is safe for use in coloring products, including cosmetics and personal care products applied to the lips, and the area of the eye. | eng_Latn | 3,544 |
chastened definition | chasten (third-person singular simple present chastens, present participle chastening, simple past and past participle chastened) To punish (in order to bring about improvement in behavior, attitude, etc.); to restrain, moderate. To make chaste; to purify. | Chalcedony (pronunciation: /kælËsÉdÉni/) is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony's standard chemical structure (based on the chemical structure of quartz) is SiO2 (silicon dioxide). Chalcedony has a waxy luster, and may be semitransparent or translucent. | eng_Latn | 3,545 |
how to make lava for a homemade volcano | Build your volcano. In the center, use a container to hold liquid. Depending on how big you are making your volcano, this can be an old water bottle, soda bottle with the top cut off, or even a simple glass jar. Add ingredients to your container. This includes water, vinegar, dish detergent and food coloring.o not add your baking soda at this stage. Add the baking soda when you are ready for an eruption. Wrap the baking soda in a tissue and drop into the volcano. The baking soda will react with the vinegar and cause the eruption. | Photo by Steve Mattox. Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases). As magma gets closer to the surface and cools, it begins to crystallize minerals like olivine and form bubbles of volcanic gases.When lava erupts it is made up of a slush of crystals, liquid, and bubbles.The liquid âfreezesâ to form volcanic glass. Chemically lava is made of the elements silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium (plus other elements in very small concentrations.hen lava erupts it is made up of a slush of crystals, liquid, and bubbles. The liquid âfreezesâ to form volcanic glass. Chemically lava is made of the elements silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium (plus other elements in very small concentrations. | eng_Latn | 3,546 |
what is an agate made of | Agate is the name given to a group of silicate minerals that are made up primarily of chalcedony. Chalcedony is a member of the quartz family of minerals. | The agate is normally formed by a sol gel process at temperatures around 500-600 deg c but can be as low as 100 deg c. This puts silica into a solution which solidifies to a gel then a solid as the temp and pressure drop. | eng_Latn | 3,547 |
andamooka opal | Andamooka Opal. The Andamooka Opal is a famous opal which was presented to Queen Elizabeth II in 1954 on the occasion of her first visit to South Australia. It was discovered in Andamooka, South Australia, an historic opal mining town. The opal was cut and polished by John Altmann to a weight of 203 carats (40.6 g). | Types of Opal. Opal is a hydrated amorphous form of silica; its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike the other crystalline forms of silica, which are classed as minerals. | zsm_Latn | 3,548 |
most important mineral for the body | Calcium, the most abundant mineral in your body, is required for developing and maintaining strong bones and teeth, according to the University of Maryland Medical Center. About 99 percent of the calcium in your body is stored in your bones and teeth. | Calcium is the most common mineral in the body and one of the most important. The body needs it to build and fix bones and teeth, help nerves work, make muscles squeeze together, help blood clot, and help the heart to work. | eng_Latn | 3,549 |
define: opine | Verb[edit] opine â(third-person singular simple present opines, present participle opining, simple past and past participle opined) (intransitive) To have or express an opinion; to state as an opinion; to suppose, consider (that). | Freebase(0.00 / 0 votes)Rate this definition: Opal is a hydrated amorphous form of silica; its water content may range from 3% to 21% by weight, but is usually between 6% to 10%. Because of its amorphous character it is classed as a mineraloid, unlike the other crystalline forms of silica which are classed as minerals. | eng_Latn | 3,550 |
what is calcium citrate | Calcium citrate is a calcium supplement derived from citric acidâa substance commonly found in citrus fruits and other fruits and vegetables. While calcium citrate is an acidic form of calcium, calcium carbonate, another calcium supplement, is alkaline based. | Calcium citrate is a calcium supplement derived from citric acidâa substance commonly found in citrus fruits and other fruits and vegetables. While calcium citrate is an acidic form of calcium, calcium carbonate, another calcium supplement, is alkaline based. | eng_Latn | 3,551 |
what are coral reefs made of | A coral reef is made of thin layers of calcium carbonate. Coral polyps form a living mat over a calcium carbonate skeleton. Stony corals (or scleractinians) are the corals primarily responsible for laying the foundations of, and building up, reef structures. | In the so-called true stony corals, which compose most tropical reefs, each polyp sits in a cup made of calcium carbonate. Stony corals are the most important reef builders, but organpipe corals, precious red corals, and blue corals also have stony skeletons. | eng_Latn | 3,552 |
sucre meaning | The noun SUCRE has 2 senses: 1 1. the basic unit of money in Ecuador; equal to 100 centavos. 2. the legal capital and seat of the judiciary in Bolivia. 2 Meaning: 3 The basic unit of money in Ecuador; equal to 100 centavos. 4 Classified under: 5 Nouns denoting quantities and units of measure. 6 Hypernyms (sucre is a kind of...): | 1. (Zoology) a hard iridescent substance, mostly calcium carbonate, that forms the inner layer of the shells of certain molluscs, such as the oyster. It is used to make buttons, inlay furniture, etc. Also called: nacre. 2. (Elements & Compounds) a hard iridescent substance, mostly calcium carbonate, that forms the inner layer of the shells of certain molluscs, such as the oyster. | eng_Latn | 3,553 |
Face is plastic, not mineral. | This is the second one I have bought, I use it as a beater for work, but the face is plastic, not mineral. It keeps good time, and is a great watch for the price. | read the fine print. Made to be used with Dr. Whoochaface's scoopable Precious Cat Litter. | eng_Latn | 3,554 |
Is there a chemical formula for clay? If so, which one is it? | What is the chemical formula for clay? | How do I change my clan name on Clash of Clans? | eng_Latn | 3,555 |
What are the ingredients in plain cement concrete and sand cement mixing ratio? | What are the ingredients in plain cement concrete and sand cement ration? | What are some examples of cinder cone volcanoes? What are the parts of cinder cone volcanoes? | eng_Latn | 3,556 |
Why are stromatolites so important? | Why are stromatolites important? | What are the benefits of alkaline water? Alkaline sticks? | eng_Latn | 3,557 |
What is calcium carbonate salt, and what purpose does it serve? | What is calcium carbonate used for? | Is Actuarial Science a course worth pursuing for a Chartered Accountant? | eng_Latn | 3,558 |
This semimetallic element is the second-most common element on Earth after oxygen | Glossary Term - 10 Most Abundant Elements in the Earth's Crust 10 Most Abundant Compounds<br>in the Earth's Crust Previous Term ... 10 Most Abundant Elements<br>in the Universe. 10 Most ... Oxygen, 46.1%, 461,000. | Game # Jeopardy Review Game Answer Key - Super Teacher Tools is a globular cluster of cells specialized to detect the four basic types of chemicals found in foods. tast bud ... #2, The green sea type of this swims over 1,000 miles from South America to Ascension Island, in order to breed, turtle. #3, Species of... | eng_Latn | 3,559 |
A common mineral used to make plaster of Paris | A common mineral used in wallboard and plaster of Paris is gypsum ... Nov 19, 2006 ... A common mineral used in wallboard and plaster of Paris is gypsum, ... I think you can always drive off water of hydration if you make it hot... | jeopardy/2555_Qs.txt at master jedoublen/jeopardy GitHub FINE CHINA | Circa 1800, Josiah Spode II created this by adding powdered bone to hard-paste porcelain | bone china. right: Paul. Wrong: Value: $200. Number:... | eng_Latn | 3,560 |
Feldspar | feldspar - Chemical composition | mineral | Britannica.com All the rock-forming feldspars are aluminosilicate minerals with the general formula AT 4O 8 in which A = potassium, sodium, or calcium (Ca); and T = silicon (Si)... | Philippine resistance against Japan - Wikipedia The Huk recruitment campaign progressed more slowly than Taruc had expected, due to competition with U.S. Army Forces Far East (USAFFE) guerrilla units in... | deu_Latn | 3,561 |
About 6% of the ore mined for this mineral contains usable fibers | Mineral Commodity Summaries 2013 - USGS Mineral Resources ... Jan 24, 2013 ... They contain statistical data on minerals and materials and include information on .... mineral commodities mined in the United States, but .... 6. 4.58. Gold, zinc, silver, lead, sand and gravel (construction). ... Iron ore (usable shipped), cement (portland), sand and ...... properties of fibers were not required. | Jeopary Questions page 1105 - ARCHITECTS - TriviaBistro.com LITERARY TRANSLATIONS: Gogol's 1842 "mortal"ity play "Myortvye Dushi" WOOL: Wool is one of the main industries of these islands fought over in a brief... | eng_Latn | 3,562 |
It's added to swimming pools & is a part of laundry bleaches | Bleach - Wikipedia The bleaching process has been known for millennia, but the chemicals currently used for ... Sodium perborate as a laundry bleach had been used in Europe since the .... treat water for drinking and keep swimming pools free of infectious agents. .... A 1-in-5 dilution of household bleach with water (1 part bleach to 4 parts... | We've got a lot of black sand here ... so where's our gold? - Opinion - Mar 6, 2012 ... Black sand beaches around the world often have gold deposits. ... which are common on Hawaiian beaches, or eroded out of hard rock by water and ... quartz and feldspar, which are the most common minerals in our beach sands. ... The Pacific Northwest Coast, comes a description of beach sand grains... | eng_Latn | 3,563 |
6 letters,score 24:Composed of silicon dioxide, it's the most abundant mineral on Earth's surface | Chemistry and Chemical Reactivity 8th Edition.pdf - Chemistry 166 ... Jun 21, 2013 ... Available 24/7. ... Score better on exams, get homework help, and more! .... Chemistry and Its Methods Hypotheses, Laws, and Theories A ... Isotopes Isotope Abundance Determining Atomic Mass and Isotope Abundance . ..... Silicon Silicon Dioxide Silicate Minerals with Chain and Ribbon... | Jeopary Question, BEHOLD THE POWER OF CHEESE - TriviaBistro ... ... Daily Trivia Download Trivia. Next Question. Salata is the dense processed form of this "recooked" Italian cheese. This question originally aired on December... | eng_Latn | 3,564 |
This dark volcanic rock is low in silica content but fairly rich in iron & magnesium | The Quartz Page: Quartz as a Rock-Forming Mineral Oct 3, 2014 ... When one talks about the Earth's crust as a whole, volcanic rocks are ... These rocks have a very low quartz content or are void of it. ... Quartz is one form of silica, SiO2, but the terms "quartz content" and "silica ..... The term mafic originally referred to minerals rich in magnesium and iron (ferrum in Latin). | Jeopary Questions page 1105 - ARCHITECTS - TriviaBistro.com LITERARY TRANSLATIONS: Gogol's 1842 "mortal"ity play "Myortvye Dushi" WOOL: Wool is one of the main industries of these islands fought over in a brief... | eng_Latn | 3,565 |
The fifth most abundant element in the Earth's crust, it helps build strong bones in your body | Alkaline Earth Metals - humans, body, used, water, process, plants ... Like the alkali metals, the alkaline earth metals react with acids and water to produce hydrogen gas. ... Magnesium is the sixth most common element in Earth's crust. ... on Earth, exceeded only by iron and aluminum, and the fifth most common element. ... One of its function is the proper development of bones and teeth. | Jeopary Questions page 883 - RANKS & TITLES - TriviaBistro.com THE HISTORY CHANNEL: Sparta provided Greece's toughest men & its ... ON THE LANDSCAPE: It's a fertile area of the desert, or a "Supersonic" rock group. | eng_Latn | 3,566 |
Most rocks are composed primarily of oxygen & this element | Minerals & Rocks Review Qs Which two rocks are composed primarily of quartz, feldspar, and clay minerals? ... The mineral quartz in rock A is composed of the two most abundant elements by mass in Earth's crust. .... Which model best represents the silicon-oxygen. | "This & That" Newsletter - Octover 2005 - Oklahoma History Website Oct 6, 2005 ... It says on the postcard Leroy Thompson and his band. .... On the way home, on Portland Avenue in Oklahoma City, we looked over and in the .... Put out a variety of ingredients such as: cheeses, ham, onion, green pepper, ...... You just put your right foot in and put your right foot out to perform one of the... | eng_Latn | 3,567 |
A fibrous mineral formerly used to make fireproof articles | Mineral asbestos - definition of Mineral asbestos by The Free ... 1. a fibrous mineral, either amphibole or chrysotile, formerly used for making incombustible or fireproof articles and in building insulation. 2. a fabric woven from... | Jeopary Question, "PAR" FOR THE COURSE - TriviaBistro.com Next Question. The name of this herb comes from the Greek for "rock celery"; petrocelinon. This question originally aired on November 20, 1987. waiting... | eng_Latn | 3,568 |
This element makes up about 1 percent of the mass of Earth but about 75 percent of the mass of the universe | Elements in the Earth's Crust - Windows to the Universe Together, these 8 elements make up more than 98% of the crust. The 8 most common elements in Earth's crust (by mass): 46.6% Oxygen (O) ... There are lots of rocks in Antarctica, but the one that scientists just found is special. It may provide... | Game # Jeopardy Review Game Answer Key - Super Teacher Tools is a globular cluster of cells specialized to detect the four basic types of chemicals found in foods. tast bud ... #2, The green sea type of this swims over 1,000 miles from South America to Ascension Island, in order to breed, turtle. #3, Species of... | eng_Latn | 3,569 |
This form of silica is the main constituent of sand and flint | What is Silica? grains may be of any mineral composition, the dominant component of sand is the .... include jasper and flint. ... The three major forms of crystalline silica -quartz,. | About Us - Official Website for the City of His grandfather had built a cedar log cabin on Baltic Ave. at the site of the recently ... and even had ideas of making the island a health resort but access to the island had ... SAND. It was everywhere, from the train cars to the hotel lobbies. In 1870 ... was asked to think up a way to keep the sand out of the hotels and rail cars. | eng_Latn | 3,570 |
How one can distinguish between amorphous and noncrystalline materials? | amorphous is without form: ant. crystalline\ncrystalline is having regular molecular structure: ant. amorphous\namorphous is synonymous to non-crystalline. The two terms are interchangeable and not dissimilar. | It is a very tough question you asked my dear friend and for this reason i think no one gave any answer yet. So i suggest you to put your question in google or yahoo search engine and you will get many links for your answer. Try the followings :\n\nhttp://www.google.co.uk/ \n\nhttp://search.yahoo.com/ | eng_Latn | 3,571 |
why crystallized quartz is coloury? | Because of the presence of other minerals in the silicon dioxide. | et pourquoi les australiens jouent en jaune et vert ? ( au lieu de bleu, blanc rouge , comme leur drapeau ) | eng_Latn | 3,572 |
What are some silicon facts? | GENERAL INFORMATION\n* Atomic Symbol-Si\n* Atomic Number-14\n* Atomic Mass-28.0855\n* Group name-Carbon family\n\nHISTORY\n* discovered in 1824\n* discovered by Jöns Jacob Berzelius\n* found in the earth's crust\n\nPHYSICAL CHARACTERISTICS\n* melting point-1687K\n* sate of matter-solid\n* color-dark grey, bluish tinge\n* density-2330kg/m\n\nCHEMICAL PROPERTIES\n* ionization energy-8.152 eV\n* electronegativy-1.90 (pauling scale)\n* boiling point-3538K\n* relatively inert\n\nUSES\n* semi-conductors\n* glass\n* concrete\n* brick\n* pottery\n* cosmetics\n* computers\n* medical equipment\n* biological uses\n\nTOXICITY\n* can be combustible\n* explosive when in contact with halogen oxidants\n* inhalation causes coughing\n* contact with skin or eyes can cause redness\n\nINTERESTING ASPECTS OF SILICON\n* 2nd most abundant element in the earth's crust\n* Silicon Valley, CA is named after the element because of its use in technology\n* present in the sun and stars\n* In Latin, Silex meaning flint | look them up on www.ask.com. Wierd school project\n\n\n\n)yahoo( | eng_Latn | 3,573 |
what are some words that start with the prefix phil? | philosophy\nphilanderer\nphilology\nphilatelist\nPhiladelphia | If you are trying to avoid phosphates that I recommend that you look into a company called Melaleuca. Many of their products are phosphate-free. I haven't done enough research, but all their products might be phosphate free.\n\nSorry, I don't know about the common brands because I avoid those!\n\nI put there site link down below. | eng_Latn | 3,574 |
does anyone kno the chemical formula or structure of Sodium aluminium silicate? | nope, but you should search up science websites in google | As an Audiologist, I know what it is; but I've been out of grad. school for almost 15 years, so I can't address the other parts of your question.\n\nYou probably already know they have a website: \nhttp://www.nsslha.org/nsslha/\nThere are forums there, where you are more likely to get appropriate responses to your question. \n\nGood luck with your studies! | eng_Latn | 3,575 |
it's a materieals scince topic | when something gets too cold\nexample: at room temps, steel is tough, can be bent but not break, welded, and hammered. when you get it cold enough, and hit it with a hammer, it would shatter just like a glass window. | To teach about the importance of minerals put a egg shell ( has calcium like bones) inside a cup with vinegar and see it go limp.\nChildren loves it and can see the importance of minerals in bone formation\nAbout carbs the best way is to bring a Cookie jar and wile they eat you tell them about energy. | eng_Latn | 3,576 |
I have a really hard science worksheet if u answer this I might need more help | Proteus was Poseidon's attendant and is a moon of Neptune, but there's an extra s in your letters | To teach about the importance of minerals put a egg shell ( has calcium like bones) inside a cup with vinegar and see it go limp.\nChildren loves it and can see the importance of minerals in bone formation\nAbout carbs the best way is to bring a Cookie jar and wile they eat you tell them about energy. | eng_Latn | 3,577 |
What is a mineraloid? Give three examples.? | A mineraloid is a mineral-like substance that does not demonstrate crystallinity. Mineraloids possess chemical compositions that vary beyond the generally accepted ranges for specific minerals.\n\n Some examples of mineraloids are: Obsidian, Opal and Limonite. | Why don't you try doing your own homework, rather than cheating to get your degree??? | eng_Latn | 3,578 |
What are some common applications for calcium carbonate salt? | What is calcium carbonate used for? | What is calcium hydroxide used for? | eng_Latn | 3,579 |
How does phosphorus react with chlorine? | Does phosphorus react with chlorine? | Why can't phosphorus, silicon and sulphur react with water? | eng_Latn | 3,580 |
what is calcium in the body | Calcium is a mineral that the body needs for numerous functions, including building and maintaining bones and teeth, blood clotting, the transmission of nerve impulses, and the regulation of the heartâs rhythm. Ninety-nine percent of the calcium in the human body is stored in the bones and teeth. | Calcium is the fifth-most-abundant element by mass in the human body, where it is an important cellular ionic messenger with many functions. Calcium also serves as a structural element in bone. It is the relatively high-atomic-number calcium in the skeleton that causes bone to be radio-opaque.alcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth 's crust. The ion Ca 2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate. | eng_Latn | 3,581 |
what are gypsums | Gypsum is a rock like mineral commonly found in the earthâs crust, extracted, processed and used by Man in construction or decoration in the form of plaster and alabaster since 9000 B.C.. Plaster was discovered in Catal-Huyuk in Asia in an underground fresco, and in Israel Gypsum floor screeds were found from 7000 B.C. | Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is widely mined and is used as a fertilizer, and as the main constituent in many forms of plaster, blackboard chalk and wallboard. | eng_Latn | 3,582 |
what nutrient category is ash in food | The ash content is a measure of the total amount of minerals present within a food, whereas the mineral content is a measure of the amount of specific inorganic components present within a food, such as Ca, Na, K and Cl. | The ash content is a measure of the total amount of minerals present within a food, whereas the mineral content is a measure of the amount of specific inorganic components present within a food, such as Ca, Na, K and Cl. | eng_Latn | 3,583 |
what part does phosphorus play in plant growth | Basic ingredients in standard fertilizers use a combination of nitrogen, phosphorus and potassium to promote vigorous and healthy plant growth. Although these elements are only a few of the necessary 17 nutrients required for plants, phosphorus plays a significant role in cell division and photosynthesis. It affects almost every part of the plant during its life cycle. | Phosphorus (P) is an essential element classified as a macronutrient because of the relatively large amounts of P required by plants. Phosphorus is one of the three nutrients generally added to soils in fertilizers. One of the main roles of P in living organisms is in the transfer of energy. Organic compounds that contain P are used to transfer energy from one reaction to drive another reaction within cells. | eng_Latn | 3,584 |
which mineral is found in granitic continental crust and basaltic oceanic crust | The continental crust is made of granitic rocks, which have even more silicon and aluminum than the basaltic oceanic crust; they also have more oxygen thanks to the atmosphere. Granitic rocks are even less dense than basalt. In terms of minerals, granite has even more feldspar, less amphibole than basalt and almost no pyroxene or olivine, plus it has abundant quartz. In geologist's shorthand, continental crust is felsic. | Basalt is fine-grained so that the individual minerals are not visible, but they include pyroxene, plagioclase feldspar and olivine. These minerals are visible in the coarse-grained, plutonic version of basalt called gabbro. | eng_Latn | 3,585 |
is volcanic glass a mineral | Owner of Jones Mineral Cabinet, Geology and Paleontology Supervisor, interested in Earth and Planetary sciences. Volcanic glass is not a mineral. It's composition is complex, and their is no crystalline structure. | 1 Volcanic glass is unstable and tends to change spontaneously (devitrify) from the glassy to the crystalline state in periods of time that are relatively short by geologic standards; the material takes on a stony appearance due to the presence of minutely crystalline aggregates. | eng_Latn | 3,586 |
most abundant salts in the ocean | The most abundant salts in the ocean are chlorine, sodium, magnesium, sulfur, calcium, and potassium. Ocean salinity is affected by multiple factors including ice melt, inflow of river water, evaporation, precipitation, wind, wave motion, and ocean currents. | Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth 's crust. The ion Ca 2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.alcium salts are colorless from any contribution of the calcium, and ionic solutions of calcium (Ca 2+) are colorless as well. As with magnesium salts and other alkaline earth metal salts, calcium salts are often quite soluble in water. | eng_Latn | 3,587 |
what is sodium metasilicate | sodium metasilicate. noun, Chemistry. 1. a white, granular sodium silicate, Na 2 SiO 3 , soluble in water: used in detergents and in bleaching and cleaning products. Origin of sodium metasilicate. 1925-1930. First recorded in 1925-30; meta- + silicate. | Excipient (pharmacologically inactive substance) Sodium metabisulfite has a molecular formula of Na2O5S2 and is consider an antioxidant. Sodium metabisulfite is used as a food preservative and in the commercial wine making industry. In the paper and textile industry it is used as a bleaching agent. | eng_Latn | 3,588 |
what is mineral | A mineral is a naturally occurring substance, representable by a chemical formula, that is usually solid and inorganic, and has a crystal structure.It is different from a rock, which can be an aggregate of minerals or non-minerals and does not have a specific chemical composition.inerals are not equivalent to rocks. A rock is either an aggregate of one or more minerals, or not composed of minerals at all. Rocks like limestone or quartzite are composed primarily of one mineralâ calcite or aragonite in the case of limestone, and quartz in the latter case. | mineral. n. 1. (Minerals) any of a class of naturally occurring solid inorganic substances with a characteristic crystalline form and a homogeneous chemical composition. | eng_Latn | 3,589 |
what is in azomite | AZOMITE® Trace Minerals. AZOMITE ® is a natural product mined from an ancient mineral deposit in Utah (USA) that typically contains a broad spectrum of over 70 minerals and trace elements, distinct from any mineral deposit in the world. | Azomite is a natural re-mineralizer for soil. It contains more than 67 trace mineral elements and every essential micro-mineral needed by plants and animals, including a wide range of rare earth elements and other minerals not included in fertilizers or animal feeds. | eng_Latn | 3,590 |
what is the most abundant element in the earth's crust | · just now. Report Abuse. The most abundant element in the earth's crust is oxygen, making up 46.6% of the earth's mass. Silicon is the second most abundant element (27.7%), followed by aluminum (8.1%), iron (5.0%), calcium (3.6%), sodium (2.8%), potassium (2.6%). and magnesium (2.1%). | Oxygen is the most abundant element in rocks in Earth's crust, composing roughly 47 percent of the weight of all rock. The second most abundant element is silicon at 27 percent, followed by aluminum at 8 percent, iron at 5 percent, calcium at 4 percent, and sodium, potassium, and magnesium at about 2 percent each.xygen is the most abundant element in rocks in Earth's crust, composing roughly 47 percent of the weight of all rock. The second most abundant element is silicon at 27 percent, followed by aluminum at 8 percent, iron at 5 percent, calcium at 4 percent, and sodium, potassium, and magnesium at about 2 percent each. | eng_Latn | 3,591 |
which elements do silicate minerals often bond to? | Silicates are minerals that contain silicon atoms bonded to oxygen atoms. The basic building block for all silicate minerals is called a tetrahedron, where one silicon atom is bonded to 4 oxygen atoms (Figure 3.6). Silicate minerals also often contain other elements, such as calcium, iron, and magnesium. | Silicates do not dissolve very easily, but they do react with water to form new minerals. Feldspars react with water to form clay minerals and ions, olivine reacts with water and O 2 to form oxides, clay minerals and ions, pyrite reacts with water and O 2 to form oxides and sulfate ions. | eng_Latn | 3,592 |
calcium what is | Calcium is a chemical element which is essential for living organisms, including humans. Calcium's chemical symbol is Ca. It is found in many foods. We need to consume a certain amount of calcium to build and maintain strong bones and healthy communication between the brain and various parts of the body. | What is another word for calcium carbonate? Sentences with the word calcium carbonate What is the meaning of the word calcium carbonate? How do you pronounce the word calcium carbonate? Words that rhyme with calcium carbonate What is the opposite of calcium carbonate? | eng_Latn | 3,593 |
common minerals list | Common rock-forming minerals. These are specimens of minerals from the University of Auckland's collection. Along with the common rock-forming minerals, we have included apatite, corundum, diamond, fluorite, topaz and talc to illustrate minerals used in Moh's Scale of Hardness.Click on either a thumbnail, or the name in the list at the side, for details and larger photographs of each mineral.hese are specimens of minerals from the University of Auckland's collection. Along with the common rock-forming minerals, we have included apatite, corundum, diamond, fluorite, topaz and talc to illustrate minerals used in Moh's Scale of Hardness. | The Body - Mineral Chart . In humans the most important dietary minerals can be seen below: | eng_Latn | 3,594 |
what are minerals we mine for | If the word mineral makes you think of rocks, you're right! Minerals are substances like calcium, phosphorus, iron, and zinc that are found in rocks and the soil. They also are needed for optimal nutrition. There are 16 different minerals that are known to be needed in our diets. | Minerals are natural compounds formed through geological processes. Minerals are needed by the body in small amounts to help it function properly and stay strong. Iron, calcium, potassium, and sodium are some of essential minerals.Humans need small amounts of about 14 minerals to maintain normal body function and good health.race minerals includes Iron, Manganese, Copper, Iodine, Zinc, Fluoride, and Selenium. The physical characteristics of minerals include traits which are used to identify and describe mineral species. These traits include Shape, Color, Streak, Luster, Density, Hardness, Cleavage, Fracture, Tenacity, and Crystal Habit. | eng_Latn | 3,595 |
what is molybdenum | Molybdenum is a chemical element with symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Greek μÏλÏ
Î²Î´Î¿Ï molybdos, meaning lead, since its ores were confused with lead ores.olybdenum-98 is the most abundant isotope, comprising 24.14% of all molybdenum. Molybdenum-100 has a half-life of about 10 19 y and undergoes double beta decay into ruthenium -100. Molybdenum isotopes with mass numbers from 111 to 117 all have half-lives of approximately 150 ns. | Molybdenum is a trace mineral required by almost all living organisms. It works as a cofactor for enzymes that carry out important chemical reactions involving carbon, nitroge ⦠n, and sulfur. It is involved in many important biological processes, possibly including development of the nervous system, waste processing in the kidneys, and energy production in cells. | eng_Latn | 3,596 |
what dissolves creosote | Sodium Chloride. Sodium chloride, also known as table salt, is a simple chemical that is easy to find. Put a little salt in the fire while it is burning. The salt combines with the water in the burning wood to create a weak acid that travels up the chimney and dissolves small amounts of creosote. This method should be used with care, however. It should not be overdone and should not be used in a metal chimney, as the acid can interact with the metal and cause corrosion. | Creosote Deposits & Fire Hazards in Chimneys. CREOSOTE FIRE HAZARDS - CONTENTS: What is creosote, how does it form in a chimney. Why is chimney creosote a serious fire hazard. How can we minimize the fire risk from creosote deposits. | eng_Latn | 3,597 |
what is the most common type of bonding in minerals? | In molecules, elements are not merely mixed together, but are joined by chemical bonds. Chemical bonds in minerals are of four types: covalent, ionic, metallic, or Van der Waals, with covalent and ionic bonds most common. Two or more of these bond types can and do coexist in most minerals. Covalent bonds are very strong bonds formed when atoms share electrons with neighboring atoms. Sulfur, and both of carbon's natural forms, graphite and diamond, are covalently-bonded minerals. So is quartz, which contains only silicon and oxygen. | Most common type of chemical bonding is single covalent bonding, where one pair of valence electrons is shared by the two atoms.Valence electrons are those that are in the outer orbit or shell of an atom.ost common type of chemical bonding is single covalent bonding, where one pair of valence electrons is shared by the two atoms. | eng_Latn | 3,598 |
what is silicon element classification | Silicon is a chemical element with symbol Si and atomic number 14. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table.Controversy about silicon's character dates to its discovery; it was first prepared and characterized in pure form in 1823.easured by mass, silicon makes up 27.7% of the Earth's crust and is the second most abundant element in the crust, with only oxygen having a greater abundance. Silicon is usually found in the form of complex silicate minerals, and less often as silicon dioxide (silica, a major component of common sand). | Silicon is a chemical element with symbol Si and atomic number 14. A hard and brittle crystalline solid with a blue-gray metallic luster, it is a tetravalent metalloid. It is a member of group 14 in the periodic table, along with carbon above it and germanium, tin, lead, and flerovium below. | eng_Latn | 3,599 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.