Carbon is the chemical element with symbol C and atomic
number 6. As a member of group 14 on the periodic table, it is nonmetallic
and tetravalent—making four electrons available to
form covalent chemical
bonds. There are three naturally occurring isotopes, with 12C
and 13C
being stable, while 14C is radioactive, decaying with a half-life
of about 5730 years.
Carbon is one of the few
elements known since antiquity.
The name "carbon" comes from Latin language carbo, coal.
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Related Tags: ozone, atmosphere
Search the Web for OzoneA family of man-made compounds that includes, but are not limited to, chlorofluorocarbons (CFCs), bromofluorocarbons (halons), methyl chloroform, carbon tetrachloride, methyl bromide, and hydrochlorofluorocarbons (HCFCs). These compounds have been shown to deplete stratospheric ozone, and therefore are typically referred to as ODSs.
Chemical compounds, such as carbon monoxide, methane, non-methane hydrocarbons, and nitrogen oxides, which in the presence of solar radiation react with other chemical compounds to form ozone, mainly in the troposphere.