Question

The pair of ions having same electronic configuration is .............. .
(a) Cr³⁺, Fe³⁺
(b) Fe³⁺, Mn²⁺
(c) Fe³⁺, Co³⁺
(d) Sc³⁺, Cr³⁺

Answer 1

b)

bcz atomic nor of Fe is 26 which is 23for Fe3+.

And for Mn it is 25 and for Mn2+ it. is 23