it makes cats puke out Orange Juice
Heliom is a hypothetical chemical element sometimes referenced in discussions about the periodic table. It is often used as an example to illustrate gaps or missing elements in the periodic table. However, heliom is not a real element and does not exist in nature.
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.