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Question: Answered & Verified by Expert
Which one of the following lanthanide ions does not exhibit paramagnetism?
Chemistryd and f Block ElementsTS EAMCETTS EAMCET 2015
Options:
  • A $\mathrm{Lu}^{3+}$
  • B $\mathrm{Ce}^{3+}$
  • C $\mathrm{Eu}^{3+}$
  • D $\mathrm{Yb}^{3+}$
Solution:
1950 Upvotes Verified Answer
The correct answer is: $\mathrm{Lu}^{3+}$
Generally, paramagnetism is shown by lanthanoid ions. The paramagnetism arises due to presence of unpaired electrons in $f$-orbital.
$\mathrm{Lu}^{3+}\left(4 f^{14}\right)$ does not have unpaired electrons.
Hence, it does not exhibit paramagnetism.

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