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(B) According to Molecular Orbital Theory,the electronic configuration of the $O_2$ molecule ($16$ electrons) is: $(\sigma 1s)^2 (\sigma^* 1s)^2 (\sig

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$6$ electrons

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(B) According to Molecular Orbital Theory,the electronic configuration of the $O_2$ molecule ($16$ electrons) is: $(\sigma 1s)^2 (\sigma^* 1s)^2 (\sigma 2s)^2 (\sigma^* 2s)^2 (\sigma 2p_z)^2 (\pi 2p_x)^2 = (\pi 2p_y)^2 (\pi^* 2p_x)^1 = (\pi^* 2p_y)^1$ The antibonding molecular orbitals (ABMOs) are $\sigma^* 1s$,$\sigma^* 2s$,$\pi^* 2p_x$,and $\pi^* 2p_y$. The electrons in these antibonding orbitals are: $\sigma^* 1s$: $2$ electrons $\sigma^* 2s$: $2$ electrons $\pi^* 2p_x$: $1$ electron $\pi^* 2p_y$: $1$ electron Total antibonding electrons = $2 + 2 + 1 + 1 = 6$ electrons.

According to molecular orbital theory,antibonding molecular orbitals of $O_2$ contain

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