A) \[[Ar]\,4{{s}^{1}}3{{d}^{8}}\]
B) \[[Ar]\,4{{s}^{2}}3{{d}^{10}}4{{p}^{1}}\]
C) \[[Ar]\,4{{s}^{1}}3{{d}^{10}}\]
D) \[[Ar]\,3{{d}^{9}}\]
Correct Answer: D
Solution :
\[_{29}Cu=[Ar]\,3{{d}^{10}}4{{s}^{1}},\,C{{u}^{2+}}=[Ar]\,3{{d}^{9}}.4{{s}^{0}}\]. Ground state of \[C{{u}^{29}}=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}4{{s}^{1}}\] \[C{{u}^{2+}}=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{9}}\].
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