Question

Which one of the following is paramagnetic?

• A. $H_2$
• B. $N_2$
• C. $N^{3-}$
• D. $NO^{+}$

Answer 1

Answer: (C)

$N^{3-}$

Answer 2

$H_2^- : \sigma (1s)^2$ Diamagnetic $N_{2} : KK \,\,\sigma\left(2s\right)^{2} \sigma^* \left(2s\right)^{2}\pi\left(2p_{x}\right)^{2}\pi\left(2p_{y}\right)^{2} \sigma\left(2p_{z}\right)^{2}$ Diamagnetic $N^{3-} :KK \,\,\sigma\left(2s\right)^{2}\sigma^* \left(2s\right)^{2}\pi\left(2p_{x}\right)^{1}\pi\left(2p_{y}\right)^{1}$ Paramagnetic $NO^{+} : KK\,\, \sigma\left(2s\right)^{2}\sigma^*\left(2s\right)^{2}\sigma\left(2p_{z}\right)^{2}\pi \left(2p_{x}\right)^{2}\pi\left(2p_{y}\right)^{2}$Diamagnetic