Question

The calculated spin only magnetic moment of $C{u}^{2+}$ ion is:

• A. 5.92 BM
• B. 4.90 BM
• C. 2.84 BM
• D. 1.73 BM

Answer 1

The correct option is D 1.73 BM

$C{u}^{2+}:\left[Ar\right]3d^9$

$C{u}^{2+}\text{has 1 unpaired electron}$
$\mu =\sqrt{n(n+2)}BM$
$\therefore \mu =\sqrt{3}=1.73BM$