Question

The molecular electronic configuration of $H_2^{-}$ ion is -

• A. $(\sigma 1s{)}^2$
• B. $(\sigma 1s{)}^2$$({\sigma }^{x}1s{)}^2$
• C. $(\sigma 1s{)}^3$
• D. None of the above

Answer 1

The correct option is D None of the above

since $H_2^{-}$ contains 3 electrons option a and b are wrong, and in option b there should only 2 electrons in the $1s$ orbital and other electron should be in $1s$ antibonding.