Question

Effective magnetic moment of $S{c}^{3+}$ ion is

• A. 1.73
• B. 0
• C. 5.92
• D. 2.83

Answer 1

Answer: (B)

$Sc(Z=21):1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^1$
$S{c}^{3+}:1s^{2}2s^{2}2p^{6}3s^{2}3p^6$
No. of unpaired electrons in $S{c}^{3+}=0$
$\therefore$ $\mu$ (spin only) $=\sqrt{n(n+2)}=0$
$\therefore \mu$ (effective) $=0$