Question

He2 molecules are not formed . Why?

Answer 1

He2 molecules are not formed because helium is already stable and its octet is complete. Hence it is an inert gas and it doesn't react.

Answer 2

He2 molecules are not formed because no bonding exists.

• The two bonding electrons have a bonding influence, but there are also two antibonding electrons that have a bonding influence.
• As a result, the He2 molecule does not have a tendency to form because its energy is not lower than that of two helium atoms that are closely spaced apart.
• Due to its fully filled valency shell configuration, helium has no chemical affinities. Therefore, helium cannot form a diatomic molecule.
• Since helium's octet is full and it is already stable, He2 molecules do not form. Because it doesn't react, it is an inert gas.
• Helium is a noble gas, hence He2 does not exist. They don't need to absorb or lose electrons to become stable because they are already stable. He2 cannot exist, therefore.

He2 does not exist.

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