Which one of the following species is paramagnetic in nature?

Step-by-step solution

The number of unpaired electrons and electronic configuration of the given species is shown below - V ⁴⁺[ Z =23]=[ Ar ]₁₈ 3 ~d ^1 No. of unpaired electron =1 - Sc ³⁺[ Z =2 l ]=[ Ar ]₁₈ 3 ~d ^0 No. of unpaired electron =0 - V ⁵⁺[ Z =23]=[ Ar ]₁₈ 3 ~d ^0 No. of unpaired electron =0 - Zn ²⁺[ Z =30]=[ Ar ]₁₈ 3 ~d ¹⁰ Number of unpaired electron =0 The correct option among the following is (4).