Question

What is magnetic moment of $C{e}^{3+}$ ion? (Atomic number of $Ce$ is 58)

• A. 1.73 BM
• B. 2.23 BM
• C. 1.414 BM
• D. 2.64 BM

Answer 1

The correct option is A 1.73 BM

${}_{58}Ce\to {}_{54}\left[Xe\right]4f^{1}5d^{1}6s^2$
$C{e}^{3+}\to {}_{54}\left[Xe\right]4f^1$, hence $\mu =\sqrt{n(n+2)}$
$=\sqrt{1(1+2)}=\sqrt{3}=1.73BM$