Which one of the following has no unpaired el | vedclass

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(C) According to Molecular Orbital Theory $(MOT)$,the electronic configuration of $O_2$ ($16$ electrons) is: $KK, \sigma 2s^2, \sigma^{*} 2s^2, \sigma

Vedclass · Accepted Answer

$O_{2}^{2-}$

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(C) According to Molecular Orbital Theory $(MOT)$,the electronic configuration of $O_2$ ($16$ electrons) is: $KK, \sigma 2s^2, \sigma^{*} 2s^2, \sigma 2p_z^2, \pi 2p_x^2 = \pi 2p_y^2, \pi^{*} 2p_x^1 = \pi^{*} 2p_y^1$. It has $2$ unpaired electrons.$(a)$ $O_{2}^{-}$ ($17$ electrons): Configuration ends with $\pi^{*} 2p_x^2, \pi^{*} 2p_y^1$. It has $1$ unpaired electron.$(b)$ $O_{2}^{+}$ ($15$ electrons): Configuration ends with $\pi^{*} 2p_x^1$. It has $1$ unpaired electron.$(c)$ $O_{2}^{2-}$ ($18$ electrons): Configuration ends with $\pi^{*} 2p_x^2, \pi^{*} 2p_y^2$. All electrons are paired.$(d)$ $O_{2}$ ($16$ electrons): As shown above,it has $2$ unpaired electrons.Therefore,$O_{2}^{2-}$ has no unpaired electrons.

Which one of the following has no unpaired electrons?

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