A) \[Ni\]
B) \[N{{i}^{2+}}\]
C) \[C{{u}^{2+}}\]
D) \[C{{u}^{+}}\]
Correct Answer: D
Solution :
Electronic configuration of \[Ni\] (At no.\[=28\]) and \[Cu\](At. no.\[=29\]) is \[Ni=1{{s}^{2}},\,\,2{{s}^{2}}2{{p}^{6}},\,\,3{{s}^{2}}3{{p}^{6}}3{{d}^{8}},\,\,4{{s}^{2}}\] \[Cu=1{{s}^{2}},\,\,2{{s}^{2}}2{{p}^{6}},\,\,3{{s}^{2}}3{{p}^{6}}3{{d}^{10}},\,\,4{{s}^{1}}\] Hence, \[1{{s}^{2}},\,\,2{{s}^{2}}2{{p}^{6}},\,\,3{{s}^{2}}3{{p}^{6}}3{{d}^{10}},\,\,4{{s}^{0}}\]electronic configuration shown by \[C{{u}^{+}}\] ion.
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