Question

In which of the following pairs of molecules/ions,
both the species are not likely to exist ?
A. $H(2)^(-) , H(2)^(2+)$
B. $H(2)^(+) , He(2)^(2-)$
C. $H(2)^(-) , He(2)^(2-)$
D. $H(2)^(2+)$, He(2)$

Answer 1

Correct Answer - D
Both $H(2)^(2+) and He(2)$ have zero bond order and hence
do not exist .