\(NO^+\)                     \(14\)

\(CO\)                         \(14\)

\(O_2^{2-}\)                        \(18\)

\(B_2\)                          \(10\)

\(N{O^ + } \Rightarrow KK.\sigma {(2s)^2}{\sigma ^*}{(2s)^2}.{(\pi 2{p_x})^2}\)

          \( = {(\pi 2{p_y})^2}.{(\sigma 2{p_z})^2}\) diamagnetic

\(CO \Rightarrow KK.\sigma {(2s)^2}{\sigma ^*}{(2s)^2}.{(\pi 2{p_x})^2}\)

          \( = {(\pi 2{p_y})^2}.{(\sigma 2{p_z})^2}\) diamagnetic

\(O_2^{2 - } \Rightarrow KK.\sigma {(2s)^2}{\sigma ^*}{(2s)^2}.\sigma {(2{p_z})^2}{(\pi 2{p_x})^2}\)

         \( = {(\pi 2{p_y})^2}.{\pi ^*}{(2{p_x})^2} = {\pi ^*}{(2{p_y})^2}\) diamagnetic

\({B_2} \Rightarrow KK.\sigma {(2s)^2}{\sigma ^*}{(2s)^2}.\pi {(2{p_x})^1} = \pi {(2{p_y})^1}\)   paramagnetic