Question

He2 does not exist but H2+ does exist. Explain by using molecular orbital theory.

Answer 1

He2 does not exist because it has same number of electrons in bonding and anti bonding molecular orbital due to which its bond order is zero.

But H2 has w electrons in bonding molecular orbital and no electron in anti bonding which gives its bond order as 1.

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Answer 2

Answer:

He does not exist because its bond order is zero

Explanation:

Bonding and antibonding electrons are equal