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Additional
helium
English Wikipedia - The Free Encyclopedia
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Helium
Helium
is a
chemical element
with
symbol
He
and
atomic number
2. It is a colorless, odorless, tasteless, non-toxic,
inert
,
monatomic
gas
that heads the
noble gas
group in the
periodic table
. Its
boiling
and
melting
points are the lowest among all the
elements
.
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