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Additional
technetium
English Wikipedia - The Free Encyclopedia
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Technetium
Technetium
is a
chemical element
with symbol
Tc
and
atomic number
43. It is the element with the lowest atomic number in the
periodic table
that has no
stable isotopes
: every form of it is
radioactive
. Nearly all technetium is produced synthetically, and only minute amounts are found in nature. Naturally occurring technetium occurs as a spontaneous
fission product
in
uranium ore
or by
neutron capture
in
molybdenum
ores. The chemical properties of this silvery gray, crystalline
transition metal
are intermediate between
rhenium
and
manganese
.
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