Which of the following species show maximum bond length ?
$O_2$
$Na_2O_2$
$KO_2$
All are equal
How many bonds (bond order) does $B_2$ have ?
The paramagnetic nature of oxygen can be explained by
Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule $B_2$ is
Stability of the species $Li_2, Li_2^-$ and $Li_2^+$ increases in the order of :
Which of the following has unpaired electron $(s)$ ?