Question

In which of the following pairs, the outer most electronic configuration will be the same?

(1) Cr⁺ and Mn²⁺

(2) Ni²⁺ and Cu⁺

(3) Fe²⁺ and Co⁺ 

(4)  V²⁺ and Cr^-

Answer 1

(1) Cr⁺ and Mn²⁺

Option 1  Mn⁺²[Ar]3d⁵ ,Cr⁺[Ar]3d⁵

Option 2  Ni⁺²[Ar]3d⁸ ,Cu⁺[Ar]3d¹⁰

Option 3  Fe⁺² [Ar]3d⁶ ,Co⁺[Ar]3d⁷ 4s¹

Option 4  V⁺²[Ar]3d³ ,Cr⁺[Ar]3d⁵