Question

Which one of the following lanthanide ions does not exhibit paramagnetism?

• A. $L{u}^{3+}$
• B. $C{e}^{3+}$
• C. $E{u}^{3+}$
• D. $Y{b}^{3+}$

Answer 1

Answer: (A)

Generally, paramagnetism is shown by lanthanoid ions. The paramagnetism arises due to presence of unpaired electrons in $f$ -orbital.

$L{u}^{3+}\left(4f^{14}\right)$ does not have unpaired electrons. Hence, it does not exhibit paramagnetism.