Electronic configuration of \( \mathrm{H}_{2}^{-} \)is \( \sigma_{1...

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Electronic configuration of \( \mathrm{H}_{2}^{-} \)is \( \sigma_{1 \mathrm{~s}}^{2}, \sigma_{1 \mathrm{~s}}^{* 1} \) but not
P \( \sigma_{1 s}^{3}, \sigma_{1 \mathrm{~s}}^{* 0} \) because-

W
(1) Hund's rule is violated
(2) Bond order becomes zero
(3) Pauli exclusion principle is violated
(4) Fractional bond order is not possible
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