Question

Which of the following ions has a magnetic moment of 5.93 BM?

[At . No. : V = 23 , Cr = 24, Mn = 25, Fe = 26]

• A. $M{n}^{2+}$
• B. $F{e}^{2+}$
• C. $C{r}^{2+}$
• D. $V^{3+}$

Answer 1

The correct option is A $M{n}^{2+}$

Magnetic moment $=\sqrt{n(n+2)}BM$

where n = number of unpaired electrons

$5.93=\sqrt{n(n+2)}$

$n=5$

$M{n}^{2+}$ ion $\left(3d^5\right)$ has $5$ unpaired electrons and thus, magnetic moment is $5.93BM$

Hence, option $A$ is correct.