Question

he2 does not exist explain in terms of LCAO​

Answer 1

Answer:

According to MOT;The bond order and stabilization energy of he2 molecule are zero. He2 molecule contains 4 electrons. Each atom gives 2 electrons in 1s orbitals. ... This indicates that there is no bond formation between 2 HE atoms and hence the He2 molecule does not exist.

Answer 2

He2 does not exist. It's explained in terms of LCAO as follows:-

• He2 does not exist because it has filled octets and its valency is zero. Because it has no combining capacity, it exists as a monoatomic molecule like He.
• The electrical configuration of the helium atom is 1s2. According to molecular orbital theory, both the bonding and antibonding orbitals of a hypothetical He2 molecule will have two electrons each. As a result, the bond order for such a diatomic entity is zero. That is to say, the He2 molecule does not exist.