Helium is an element. It is used to fill balloons and things.
it makes cats puke out orange juice
I think he's in the HQ. Improve this answer if I'm wrong.
They are all in group 18 in the periodic table.
The heliom inside the ballon is why a ballon able to rise.
A molecule is the combination of two or more atoms which may exist free in nature. Does this mean that one atom of heliom is NOT a molecule? yes it is not a molecule it is an atom that exists free as a molecule so the term monoatomic molecule is used for noble gase but not only molecule.