A) \[C{{u}^{2+}}\]
B) \[N{{i}^{2+}}\]
C) \[C{{o}^{2+}}\]
D) \[F{{e}^{2+}}\]
Correct Answer: A
Solution :
Ion | Electronic configuration | No. of unpaired electrons |
\[C{{u}^{2+}}\] | \[{{d}^{9}}\] | 1 |
\[N{{i}^{2+}}\] | \[{{d}^{8}}\] | 2 |
\[C{{o}^{2+}}\] | \[{{d}^{7}}\] | 3 |
\[F{{e}^{2+}}\] | \[{{d}^{6}}\] | 4 |
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