(B) In diatomic molecules from $Li_2$ to $N_2$,the energy of the $\sigma_{2p_z}$ orbital is higher than the $\pi_{2p_x}$ and $\pi_{2p_y}$ orbitals due

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The energy of $\sigma_{2p_z}$ is lower in $Li_2$ to $N_2$ than in $O_2$ to $Ne_2$.

(B) In diatomic molecules from $Li_2$ to $N_2$,the energy of the $\sigma_{2p_z}$ orbital is higher than the $\pi_{2p_x}$ and $\pi_{2p_y}$ orbitals due to $s-p$ mixing.In molecules from $O_2$ to $Ne_2$,the energy of the $\sigma_{2p_z}$ orbital is lower than the $\pi_{2p_x}$ and $\pi_{2p_y}$ orbitals because $s-p$ mixing is negligible.

Class 11 Chemistry Chemical Bonding and Molecular Structure Molecular orbital theory

Medium

What is the difference in the $MO$ energy level diagram for diatomic molecules from $Li_2$ to $N_2$ compared to those from $O_2$ to $Ne_2$?

A
The energy of $\sigma_{2p_z}$ is higher in $Li_2$ to $N_2$ than in $O_2$ to $Ne_2$.
B
The energy of $\sigma_{2p_z}$ is lower in $Li_2$ to $N_2$ than in $O_2$ to $Ne_2$.
C
There is no difference in the energy levels.
D
The $\pi_{2p_x}$ and $\pi_{2p_y}$ orbitals are higher in energy for $Li_2$ to $N_2$.