Question

Which of the following ions has the maximum magnetic moment?

Options

• Mn²⁺

• Fe²⁺

• Ti²⁺

• Cr²⁺

Answer 1

Mn²⁺ 

Explanation:

Electronic configuration of Mn²⁺ = [Ar]3d⁵ and No. of unpaired electron = 5

Electronic configuration of Fe²⁺ = [Ar]3d⁶ and No. of unpaired electron = 4

Electronic configuration of Ti²⁺ = [Ar]3d² and No. of unpaired electron = 2

Electronic configuration of Cr²⁺ = [Ar]3d⁴ and No. of unpaired electron = 4

Magnatic moment = `sqrt(n(n + 2))` B.M. Where ‘n’ is the number of unpaired electrons.