Question

What is the value of the magnetic moment of Ni in its + 2- oxidation state? (Write up to 2 decimal places)

Answer 1

In $N{i}^{+2}$ , electronic conf. will be $3d_{8}4s_0$ so in d-orbital there are 2 unpaired electrons.
Then,
$n=2$
Magnetic moment $=\sqrt{n(n+2)}=\sqrt{2(2+2)}=\sqrt{2\times 4}=2\sqrt{2}$
$=2.82BM$