Review of Short Phrases and Links|
This Review contains major "Carbon"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- Carbon is the basis for all plastic materials that are used in common household items.
- Carbon is a vital component of all known living systems, and without it life as we know it could not exist (see carbon chauvinism).
- Carbon is the fourth most common element in the sun.
- Carbon is one of the few elements that occur in nature in its free elemental form (native).
- Carbon is the fourth most abundant element in the universe, and it plays a crucial role in the health and stability of the planet through the carbon cycle.
- Hydrogen forms a vast array of compounds with carbon.
- More than 1 000 000 compounds of carbon are believed to have been discovered; the exact number never has been determined.
- Carbon compounds form the basis of all life on Earth and the carbon-nitrogen cycle provides some of the energy produced by the Sun and other stars.
- There are nearly ten million carbon compounds known to science.
- There are a tremendous number of carbon compounds; some are lethally poisonous ( cyanide, CN -), and some are essential to life ( dextrose).
- Graphite carbon in a powdered, caked form is used as charcoal for cooking, artwork and other uses.
- Graphite carbon in a powdered, caked form is used as charcoal for grilling, artwork and other uses.
- The Asgard would never invent a weapon that propels small weights of iron and carbon alloys, by igniting a powder of potassium nitrate, charcoal and sulphur.
- A ferromagnetic carbon nanofoam allotrope has also been discovered.
- At very high pressures carbon forms an allotrope called diamond, in which each atom is bonded to four others.
- The allotropes of carbon are the different molecular configurations that pure carbon can take.
- At very high pressures carbon forms the more compact allotrope diamond, having nearly twice the density of graphite.
- The last-known allotrope of carbon, fullerenes, were discovered as byproducts of molecular beam experiments in the 1980's.
- The three relatively well-known allotropes of carbon are amorphous carbon, graphite, and diamond.
- Eight allotropes of carbon: Diamond, graphite, lonsdaleite, C60, C540, C70, amorphous carbon and a carbon nanotube.
- Some of these forms include hexagonal graphite, rhombohedral graphite, diamond, buckminsterfullerene, and amorphous carbon (not really a crystalline form).
- All in all, with an electronegativity of 2.5, carbon prefers to form covalent bonds.
- Carbon in the form of microscopic diamonds is found in some meteorites.
- The major economic use of carbon is in the form of hydrocarbons, most notably the fossil fuels methane gas and crude oil.
- The major economic use of carbon is in the form of hydrocarbons, most notably the fossil fuel methane gas and crude oil (petroleum).
- Under some conditions, carbon crystallizes as Lonsdaleite, a form similar to diamond but hexagonal.
- Carbon nanotubes are structurally similar to buckyballs, except that each atom is bonded trigonally in a curved sheet that forms a hollow cylinder.
- Under some conditions, carbon crystallizes as Lonsdaleite, a form similar to diamond but forming a hexagonal crystal lattice.
- Carbon occurs in all organic life and is the basis of organic chemistry.
- Under special treatment (stretching of organic fibers and carbonization) it is possible to arrange the carbon planes in direction of the fiber.
- By some definitions, "organic" compounds are only required to contain carbon (as a classic historical example, urea).
- Carbon fiber is made by pyrolysis of extruded and stretched filaments of polyacrylonitrile (PAN) and other organic substances.
- The study of carbon compounds, both natural and synthetic, is called organic chemistry.
- Several exotic allotropes have also been synthesized or discovered, including fullerenes, carbon nanotubes, lonsdaleite and aggregated diamond nanorods.
- In diamonds, the atoms of carbon are bonded together into a three dimensional solid.
- The system of carbon allotropes spans a range of extremes: Synthetic diamond nanorods are the hardest materials known.
- It is, rather, present as a powder which is the main constituent of substances such as charcoal, lampblack ( soot) and activated carbon.
- Carbon, due to its non-reactivity with many substances that corrode most materials, is often used as an electrode.
- For example, the reference state for carbon is graphite, because it is more stable than the other allotropes.
- Pencil lead is graphite carbon and not the chemical element lead.
- As chain length increases ultimately we reach polyethylene, which consists of carbon chains of indefinite length, which is generally a hard white solid.
- Instead, the interiors of stars in the horizontal branch transform three helium nuclei into carbon by means of this triple-alpha process.
- Formation of the carbon atomic nucleus requires a nearly simultaneous triple collision of alpha particle s ( helium nuclei).
- Some of this biomass is eaten by animals, where some of it is exhaled as carbon dioxide.
- For example, plants draw carbon dioxide out of the environments and use it to build biomass.
- Their purpose is to protect the weld area from atmospheric gases, such as oxygen, nitrogen, carbon dioxide, and water vapor.
- Carbon may catch fire at very high temperatures and burn vigorously (as in the Windscale fire).
- Carbon may also spawn flames at very high temperatures and burn vigorously and brightly (as in the Windscale fire).
- With reactive metals, such as tungsten, carbon forms either carbides, C -, or acetylides, C 2 2- to form alloys with very high melting points.
- When united with oxygen it forms carbon dioxide which is absolutely vital to plant growth.
- Rotational transitions of various isotopic forms of carbon monoxide (e.g.
- Silicon is commercially prepared by the reaction of high-purity silica with wood, charcoal, and coal, in an electric arc furnace using carbon electrodes.
- In German and Dutch, the names for carbon are Kohlenstoff and koolstof respectively, both literally meaning " coal -stuff".
- Because of these properties, carbon is known to form nearly ten million different compounds, the large majority of all chemical compounds.
- The physical properties of carbon vary widely with the allotropic form.
- An abundant nonmetal lic, tetravalent element, carbon has several allotropic forms.
- An abundant nonmetallic, tetravalent element, carbon has several allotropic forms: diamonds (hardest known mineral).
- Diamond is a transparent crystal of pure carbon consisting of tetrahedrally bonded carbon atoms.
- Whereas graphite is in the form of sheets, a diamond is basically a huge "molecule" composed of carbon atoms strung together by covalent bonds.
- The most common oxidation state of carbon in inorganic compounds is +4, while +2 is found in carbon monoxide and other transition metal carbonyl complexes.
- The other common oxide is carbon monoxide (CO). It is formed by incomplete combustion, and is a colorless, odorless gas.
- In its amorphous form, carbon is essentially graphite but not held in a crystalline macrostructure.
- One main detraction for silicon-based life is that unlike carbon, silicon does not have the tendency to form double and triple bonds.
- In water it forms trace amounts of carbonic acid, H 2 CO 3, but as most compounds with multiple single-bonded oxygens on a single carbon it is unstable.
- The chemical and structural properties of fullerenes, in the form of carbon nanotubes, has promising potential uses in the nascent field of nanotechnology.
- Silicon, like carbon and other group IV elements form face-centered diamond cubic crystal structure.
- Carbon is essential to all known living systems, and without it life as we know it could not exist (see alternative biochemistry).
- Carbon is also in plenty of things that were once living, which makes it useful for dating the remains of past settlements on Earth.
- When combined with hydrogen, carbon form coal, petroleum, and natural gas which are called hydrocarbons.
- Carbon dioxide is also the gas formed when natural gas, oil and coal are burned.
- Isotopes of carbon are atomic nuclei that contain six protons plus a number of neutrons (varying from 2 to 16).
- A chemical element; its symbol is C. The carbon nucleus has six protons and six or more neutrons; six electrons are in orbit around the carbon nucleus.
- The six carbon-carbon bond lengths are identical when measured, which would be invalid for the cyclic triene.
- With smaller amounts of calcium, magnesium, and iron, carbon is a major component of very large masses carbonate rock ( limestone, dolomite, marble etc.).
- With oxygen and a metallic element, carbon forms many important carbonates, such as calcium carbonate (limestone) and sodium carbonate (soda).
- Sodium carbonate and silicon dioxide react when molten to form sodium silicate and carbon dioxide.
- The paths that carbon follows in the environment are called the carbon cycle.
- Like carbon, some isotopes of various elements are radioactive and decay into other elements upon radiating an alpha or beta particle.
- Carbon-carbon bonds are strong, and stable.
- Carbon is abundant in the Sun, stars, comets, and in the atmospheres of most planets.
- Plastics are made from synthetic carbon polymers, often with oxygen and nitrogen atoms included at regular intervals in the main polymer chain.
- The solar system is one such second-generation star, made from carbon in the dust of dozens of supernovae in its local area of the galaxy.
- At room temperature, carbon tetrafluoride is a gas, carbon tetrachloride is a liquid, and the other two compounds are solids.
- Encyclopedia of Keywords > Nature > Natural Resources > Minerals
- Encyclopedia of Keywords > Nature > Matter > Atoms
- Substance > Compounds > Salts > Carbonates
- Nature > Chemistry > Organic Chemistry > Organic Compounds
- Encyclopedia of Keywords > Nature > Chemistry
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