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(A) $HOMO$ stands for Highest Occupied Molecular Orbital.For the $N_2$ molecule,the electronic configuration is $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s

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(A) $HOMO$ stands for Highest Occupied Molecular Orbital.For the $N_2$ molecule,the electronic configuration is $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2, \pi 2p_x^2 = \pi 2p_y^2, \sigma 2p_z^2$.The $HOMO$ is the $\sigma 2p_z$ orbital.This orbital is formed by the head-on overlap of two $2p_z$ orbitals with constructive interference (same signs overlapping),which is represented by the combination of two $p$ orbitals where the lobes of the same sign face each other.

Which of the following combinations leads to the $HOMO$ of the $N_2$ molecule?

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