During the change of O_2 to O_2^-,the incomin | vedclass

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(C) The electronic configuration of $O_2$ ($16$ electrons) is: $KK \sigma_{2s}^2 \sigma_{2s}^{*2} \sigma_{2p_z}^2 \pi_{2p_x}^2 \pi_{2p_y}^2 \pi_{2p_x}

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${\pi^*}_{2p_x}$

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(C) The electronic configuration of $O_2$ ($16$ electrons) is: $KK \sigma_{2s}^2 \sigma_{2s}^{*2} \sigma_{2p_z}^2 \pi_{2p_x}^2 \pi_{2p_y}^2 \pi_{2p_x}^{*1} \pi_{2p_y}^{*1}$.When $O_2$ changes to $O_2^-$ ($17$ electrons),the incoming electron enters the next available lowest energy molecular orbital,which is the antibonding orbital ${\pi^*}_{2p_x}$ or ${\pi^*}_{2p_y}$.According to the molecular orbital diagram,the incoming electron occupies the ${\pi^*}_{2p_x}$ orbital.

During the change of $O_2$ to $O_2^-$,the incoming electron goes to the orbital

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