Question

The molecular electronic configuration of H₂⁻ ion is?
(a) (σ1s)² (b) (σ 1s)² (σ*1s)²
(c) (σ 1s)² (σ*1s)¹ (d) (σ 1s)³

Answer 1

Explanation:

(a) is right answers and thank for the point l

Answer 2

The correct molecular electronic configuration of H₂⁻ ion is : (c) (σ 1s)² (σ*1s)¹

1. The reason is that the molecular electronic configuration of H₂ molecule is (σ1s)².

2. So, when an electron is added to it to make H₂⁻ ion the electron gets added to the (σ*1s) antibonding MO and thus forms the resultant electronic configuration i.e, (c)