A) \[\text{H}_{2}^{-}\]
B) \[\text{H}_{2}^{2-}\]
C) \[\text{He}_{2}^{2+}\]
D) \[\text{He}_{2}^{+}\]
Correct Answer: B
Solution :
Since bond order of \[H_{2}^{2-}\] is zero, thus it does not exist (by MOT)
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