Question

The spin only magnetic moment of $N{i}^{2+}$ (in B.M.) in aqueous solution will be:

• A. $1.73$
• B. $2.82$
• C. $3.42$
• D. $2.25$

Answer 1

Answer: (B)

$2.82$

$N{i}^{2+}:\left[Ar\right]3d^8$ has 2 unpaired electrons.

The spin only magnetic moment, $\mu =\sqrt{n(n+2)}$

$=\sqrt{2(2+2)}=\sqrt{8}$

$=2.82$ B.M