Assuming 2s – 2p mixing is NOT operative, the paramagnetic species...

Assuming that no 2s-2p mixing takes place
(i) $B{e}_{2} \to \sigma1{s}^{2}, {\sigma}^{*}1{s}^{2}, \sigma2{s}^{2}, {\sigma}^{*}2{s}^{2}$ (diamagnetic)
(ii) ${B}_{2} \to \sigma1{s}^{2}, {\sigma}^{*}1{s}^{2}, \sigma2{s}^{2}, {\sigma}^{*}2{s}^{2}, \sigma2{p}_{z}^{2},$$\begin{array}{ll}\pi2{p}_{x}^{0} \\ \pi2{p}_{y}^{0}\end{array}$(diamagnetic)<br >(iii) ${C}_{2} \to \sigma1{s}^{2}, {\sigma}^{*}1{s}^{2}, \sigma2{s}^{2}, {\sigma}^{*}2{s}^{2}, \sigma2{p}_{z}^{2},\begin{array}{ll}\pi2{p}_{x}^{1} \\ \pi2{p}_{y}^{1}\end{array}$$,$$\begin{array}{ll}{\pi}^{*}2{p}_{x}^{0} \\ {\pi}^{*}2{p}_{y}^{0}\end{array}, {\sigma}^{*}2{p}_{z}^{0}$ (paramagnetic)<br >(iv) ${N}_{2} \to \sigma1{s}^{2}, {\sigma}^{*}1{s}^{2}, \sigma2{s}^{2}, {\sigma}^{*}2{s}^{2}, \sigma2{p}_{z}^{2},\begin{array}{ll}\pi2{p}_{x}^{2} \\ \pi2{p}_{y}^{2}\end{array}$$,$$\begin{array}{ll}{\pi}^{*}2{p}_{x}^{0} \\ {\pi}^{*}2{p}_{y}^{0}\end{array}$$, {\sigma}^{*}2{p}_{z}^{0}$ (diamagnetic)