Question

The spin only magnetic moment value of $C{r}^{3+}$ ion is $\sqrt{x}$ $B.M$. The value of ' $x$ ' is ____.

Answer 1

Answer: 15

$C{r}^{3+}:3d^3$
Spin only formula, $\mu =\sqrt{n(n+2)}B.M$.
Here $n=3,$
$\therefore \mu =\sqrt{3(3+2)}=\sqrt{15}B.M$.
$\therefore x=15$