Question

Can we have a diatomic molecule with its ground state moleculer orbitals full with electrons ? Give
a reason for your answer .

Answer 1

No. Because bond order becomes zero, e.g., in case of `He_(2), Be_(2), Ne_(2)` , etc . Note that in `H_(2), sigma _(1s)` M.O. is full
but `sigma_(1s)^(**)` is empty .