According to $MO$ theory the bond orders for $O _2{ }^{2-}$, $CO$ and $NO ^{+}$respectively, are
$1,3$ and $3$
$1, 3$ and $2$
$1,2$ and $3$
$2,3$ and $3$
Identify a molecule which does not exist.
Which of the following is diamagnetic
Use molecular orbital theory to explain why the $Be_{2}$ molecule does not exist.
Total number of electron present in $\left(\pi^*\right)$ molecular orbitals of $\mathrm{O}_2, \mathrm{O}_2^{+}$and $\mathrm{O}_2^{-}$is ............
Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule $B_2$ is