Draw an MO energy diagram and predict the bond order of Be₂⁺ and Be₂^-. Do you expect these molecules to exist in the gas phase?

Bond order of Be₂⁺ = 1; Bond order of Be₂^- = 1/2 $$

Neither can exist in the gas phase.

The bond order of Be₂⁺ and Be₂^- = 1/2.

Neither can exist in the gas phase.

Bond order of Be₂⁺ = 1; Bond order of Be₂^- = 1/2

Both can exist in the gas phase.

The bond order of Be₂⁺ and Be₂^- = 1/2.

Both can exist in the gas phase.