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The
chemical element,
chromium
was
first found
by
Vanquelin,
the French
chemist.
There
are
different
valenced
electronic
states
occurring
in
nature,
from
chromium-z
to
chromium.a.
But,
chro-
mium, chromiumu,
chromium.'
and
chromium-6 are
most common
forms.
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is
a powerful oxidant and chromiumu
is
the
most stable
structure.
Mertz
and
Shwarz,
the
researchers
of
U.S.A.,
found
the bio-
logical effect
of chromium
first
in
1969.
lt
is
one
of
the
most im-
portant discoveries in
the
present
age.
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