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 :
According to aufbau principle electronic configuration of \[Cu(29)\] should be \[29Cu=1{{s}^{2}},2{{s}^{2}}\,2{{p}^{6}},3{{s}^{2}}\,\,3{{p}^{6}}\,\,3{{d}^{9}},4{{s}^{2}}\] But correct electronic configuration of \[Cu\] is \[_{29}Cu=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10}},4{{s}^{1}}\] \[C{{u}^{2+}}=\underbrace{1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}},}_{18\,electrons}3{{d}^{9}}\] \[\because \] \[_{18}Ar=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}\] So, \[_{29}C{{u}^{2+}}=[Ar]3{{d}^{9}}\]
You need to login to perform this action.
You will be redirected in
3 sec
