Question

Why he can't form bond with another helium?

Answer 1

Answer:

if he forms a a bond of its own kind then the bond formed is very weak so it is negligible to be called as diatomic Helium atom

hope this helps you

Answer 2

Answer:

Assuming He formed a diatomic molecule.Then according to Molecular Orbital Theory it's configuration for a 4 electron molecule would be as follows:

Sigma 1s2 Sigma*1s2

Meaning it has two bonding electrons and two anti bonding electrons.

Bond order is the no. of bonds between two atoms. In this case bond order is equal to half the diff between no. of bonding and anti bonding electrons.

Bond order =1/2(2–2)=0

Hence no bond is formed between two Helium atoms.

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