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Additional
Carbon
English Wikipedia - The Free Encyclopedia
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Carbon
Carbon
(from "coal") is a
chemical element
with symbol
C
and
atomic number
6. On the
periodic table
, it is the first (row 2) of six elements in column (group) 14, which have in common the composition of their outer electron shell. It is
nonmetallic
and
tetravalent
—making four
electrons
available to form
covalent
chemical bonds. There are three naturally occurring
isotopes
, with and being stable, while is
radioactive
, decaying with a
half-life
of about 5,730 years. Carbon is one of the
few elements known since antiquity
.
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