A) \[4{{s}^{0}}3{{d}^{4}}\]
B) \[3{{p}^{6}}4{{s}^{2}}\]
C) \[4{{s}^{3}}3{{d}^{2}}\]
D) \[4{{s}^{2}}3{{d}^{0}}\]
Correct Answer: A
Solution :
The electronic configuration of\[C{{r}^{2+}}\]ion is\[=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{4}},4{{s}^{0}}\]
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