According to molecular orbital theory

1.	According to molecular orbital theory
Answer» `C_(2)^(2-)` is expected to be diamgnetic `O_(2)^(2+)` is expected to have a longer bond length then `O_(2)` `N_(2)^(+) and N_(2)^(-)` have the same ORDER `He_(2)^(+)` has the same energy as TWO isolated. He atoms Solution :In `C_(2)^(2-)` , total number of electrons = 14 (even) Hence , it is diamagnetic `O_(2)^(2+)` has bond order = 3 ,`O_(2)` has bond order = 2.5 . Hence , bond length in `O_(2)^(2+)` is LESS than that in `O_(2)` . Bond order of `N_(2)^(+)` = Bond order of `N_(2)^(-) = 2.5` Bond order of `He_(2)^(+) = (1)/(2)` ,i.e., it exists . Hence , some energy is relesed when `He_(2)^(+)` is formed from two isolated He atoms.

Discussion