Question

Which of the following ion has the maximum theoretical magnetic moment?

• A. $V^{3+}$
• B. $C{r}^{3+}$
• C. $T{i}^{3+}$
• D. $C{o}^{3+}$

Answer 1

Answer: (D)

$C{o}^{3+}$

Metal ion with maximum number of unpaired electrons will have highest magnetic momemt.

$V^{3+}$: $3d^2$: 2 unpaired electrons

$C{r}^{3+}$: $3d^3$: 3 unpaired electrons

$T{i}^{3+}$: $3d^1$: 1 unpaired electrons

$C{o}^{3+}$: $3d^6$: 4 unpaired electrons

Thus $C{o}^{3+}$ will have maximum magnetic moment.

option D is correct