Question

Calculate spin only magnetic moment of M²⁺ ion.
[atomic number of M = 26]

Answer 1

Atomic number (M) = 26

Electronic configuration of M atom = [Ar] 3d⁶ 4s²

Electronic configuration of M²⁺ = [Ar] 3d⁶

So, d-orbital has the following distribution of electrons:

There are 4 unpaired electrons.

∴ Spin only magnetic moment (μ) = `sqrt(n(n + 2))` B.M.

= `sqrt(4(4 + 2))` B.M.

= `sqrt(4(6))` B.M.

= 4.89 B.M.