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Additional
aluminum
English Wikipedia - The Free Encyclopedia
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Aluminium
Aluminium
(or
aluminum
; see ) is a
chemical element
in the
boron group
with symbol
Al
and
atomic number
13. It is a silvery-white, soft, nonmagnetic,
ductile
metal
. Aluminium is
the third most abundant element
(after
oxygen
and
silicon
), and the
most abundant metal
, in the
Earth
's
crust
. It makes up about 8 y mass of the crust, though it is less common in the mantle below. Aluminium metal is so chemically reactive that
native specimens
are rare and limited to extreme
reducing
environments. Instead, it is found combined in over 270 different
minerals
. The chief
ore
of aluminium is
bauxite
.
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