Carbon - Wikipedia
网页Carbon (from Latin carbo 'coal') is a chemical element; it has symbol C and atomic number 6. It is nonmetallic and tetravalent —meaning that its atoms are able to form up to four covalent bonds due to its valence shell exhibiting 4 electrons. It belongs to group 14 of the periodic table. [16]
Carbon - Allotropes, Structure, Bonding | Britannica
网页2024年8月23日 · When an element exists in more than one crystalline form, those forms are called allotropes; the two most common allotropes of carbon are diamond and graphite. The crystal structure of diamond is an infinite three-dimensional array of carbon atoms, each of which forms a structure in which each of the bonds makes equal angles with its neighbours ...
Carbon | Facts, Uses, & Properties | Britannica
网页2024年8月23日 · Carbon, chemical element that forms more compounds than all the other elements combined. Carbon is widely distributed in coal and in the compounds that make up petroleum, natural gas, and plant and animal tissue. The carbon cycle is one of the most important of all biological processes.
Carbon - Element information, properties and uses | Periodic Table
网页Carbon is unique among the elements in its ability to form strongly bonded chains, sealed off by hydrogen atoms. These hydrocarbons, extracted naturally as fossil fuels (coal, oil and natural gas), are mostly used as fuels.
Allotropes of carbon - Wikipedia
网页Well-known forms of carbon include diamond and graphite. In recent decades, many more allotropes have been discovered and researched, including ball shapes such as buckminsterfullerene and sheets such as graphene. Larger-scale structures of carbon include nanotubes, nanobuds and nanoribbons.
Carbon - NIST Chemistry WebBook
网页Carbon. Formula: C. Molecular weight: 12.0107. IUPAC Standard InChI: InChI=1S/C. Copy Sheet of paper on top of another sheet. IUPAC Standard InChIKey: OKTJSMMVPCPJKN-UHFFFAOYSA-N. Copy Sheet of paper on top of another sheet. CAS Registry Number: 82600-58-6. Chemical structure:
Carbon, Chemical Element - structure, reaction, water, uses, …
网页Carbon exists in a number of allotropic forms. Allotropes are forms of an element with different physical and chemical properties. Two allotropes of carbon have crystalline structures: diamond and graphite. In a crystalline material, atoms are arranged in a …
21.5: Group 14: The Carbon Family - Chemistry LibreTexts
网页2023年7月12日 · The structures of the allotropes of carbon—diamond, graphite, fullerenes, and nanotubes—are distinct, but they all contain simple electron-pair bonds (Figure 7.18). Although it was originally believed that fullerenes were a new form of carbon that could be prepared only in the laboratory, fullerenes have been found in certain types of ...
Carbon - Chemistry Online
网页2024年4月22日 · Pure carbon exists in three forms (allotropes) on Earth: graphite, diamond and buckminsterfullerene (spherical structure with 60 carbon atoms bonded together to form 12 pentagons and 20 hexagons). It has many important uses, including in the production of steel and other metals, as a component of many polymers, and as a source of energy in the ...
Structurally uniform and atomically precise carbon ... - Nature
网页2016年1月11日 · Spherical fullerene C60, cylindrical carbon nanotubes and sheet-like graphene are representative forms of nanocarbons, and theoretical simulations have predicted several exotic 3D nanocarbon ...