A) \[[Ar]4{{d}^{4}}4{{s}^{2}}\]
B) \[[Ar]3{{d}^{5}}4{{s}^{1}}\]
C) \[[Ar]3{{d}^{4}}3{{s}^{2}}\]
D) \[[Ar]4{{d}^{5}}4{{s}^{1}}\]
Correct Answer: B
Solution :
Electronic configuration of chromium (atomic number = 24) is written as : To stabilize d-orbital one electron jumps from 4s to 3d. Now, the correct configuration is: \[=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{1}}\]or \[=[Ar]3{{d}^{5}},4{{s}^{1}}.\]You need to login to perform this action.
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