Which of the following species are paramagnet | vedclass

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(A) According to Molecular Orbital Theory $(MOT)$,the electronic configuration of the species is as follows:$1$. $O_2$ ($16$ electrons): $\sigma 1s^2,

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$O_2$ and $O_2^-$

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(A) According to Molecular Orbital Theory $(MOT)$,the electronic configuration of the species is as follows:$1$. $O_2$ ($16$ electrons): $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2, \sigma 2p_z^2, \pi 2p_x^2 = \pi 2p_y^2, \pi^* 2p_x^1 = \pi^* 2p_y^1$. It has $2$ unpaired electrons,so it is paramagnetic.$2$. $O_2^-$ ($17$ electrons): $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2, \sigma 2p_z^2, \pi 2p_x^2 = \pi 2p_y^2, \pi^* 2p_x^2 = \pi^* 2p_y^1$. It has $1$ unpaired electron,so it is paramagnetic.$3$. $O_2^{2-}$ ($18$ electrons): $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2, \sigma 2p_z^2, \pi 2p_x^2 = \pi 2p_y^2, \pi^* 2p_x^2 = \pi^* 2p_y^2$. It has no unpaired electrons,so it is diamagnetic.Therefore,$O_2$ and $O_2^-$ are paramagnetic.

Which of the following species are paramagnetic: $O_2, O_2^-, O_2^{2-}$?

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