Explain why HE₂ molecule does not exist?
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The helium dimer is a van der Waals molecule with formula He2 consisting of two helium atoms.[2] This chemical is the largest diatomic molecule—a molecule consisting of two atoms bonded together. The bond that holds this dimer together is so weak that it will break if the molecule rotates, or vibrates too much. It can only exist at very low cryogenic temperatures
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As 1s orbitalcan only accomodate 2 electrons in its small shell.
1 electron's space is already occupied by hydrogen atom's electron and thus it can only accomodate one more electron. Thus HE2 isnt possible.
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