A) \[M{{g}^{2+}}\]
B) \[T{{i}^{3+}}\]
C) \[{{V}^{3+}}\]
D) \[F{{e}^{2+}}\]
Correct Answer: D
Solution :
No of unpaired electron in different ion are as under \[M{{g}^{2+}}\to 1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{0}}=0\] \[T{{i}^{3+}}\to 1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{1}},4{{s}^{0}}=1\] \[{{V}^{3+}}\to 1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{2}},4{{s}^{0}}=2\] \[F{{e}^{2+}}\to 1{{s}^{2}},2{{s}^{2}}s{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{6}},4{{s}^{0}}=4\]
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