A) \[S{{m}^{2+}}\]
B) \[E{{u}^{2+}}\]
C) \[Y{{b}^{2+}}\]
D) \[C{{e}^{2+}}\]
Correct Answer: C
Solution :
[c] \[S{{m}^{2+}}\left( Z=62 \right)\] \[\left[ Xe \right]4{{f}^{6}}6{{s}^{2}}-6\] unpaired \[{{e}^{-}}E{{u}^{2+}}\left( Z=63 \right)\] \[\left[ Xe \right]4{{f}^{7}}6{{s}^{2}}-7\] unpaired \[{{e}^{-}}Y{{b}^{2+}}(Z=70)\] \[\left[ Xe \right]4{{f}^{14}}6{{s}^{2}}-0\] unpaired \[{{e}^{-}}C{{e}^{2+}}(Z=58)\] \[\left[ Xe \right]4{{f}^{1}}5{{d}^{1}}6{{s}^{2}}-2\] unpaired \[{{e}^{-}}\] Only \[Y{{b}^{2+}}\]is diamagnetic.
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