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Chemistry
Which one of the following lanthanide ions does not exhibit paramagnetism?
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Q. Which one of the following lanthanide ions does not exhibit paramagnetism?
TS EAMCET 2015
A
$L u^{3+}$
B
$Ce ^{3+}$
C
$Eu ^{3+}$
D
$Yb ^{3+}$
Solution:
Generally, paramagnetism is shown by lanthanoid ions. The paramagnetism arises due to presence of unpaired electrons in $f$ -orbital.
$Lu ^{3+}\left(4 f^{14}\right)$ does not have unpaired electrons. Hence, it does not exhibit paramagnetism.