A) \[[Ar]\,3{{d}^{4}}4{{s}^{2}}\]
B) \[[Ar]\,3{{d}^{3}}4{{s}^{0}}\]
C) \[[Ar]\,3{{d}^{2}}4{{s}^{1}}\]
D) \[[Ar]\,3{{d}^{5}}4{{s}^{1}}\]
Correct Answer: B
Solution :
\[Cr(24):[Ar]\,\,\,3{{d}^{5}}\,4{{s}^{1}}\]\[C{{r}^{3+}}:\,\,[Ar]\,\,\,3{{d}^{3}}\,\,4{{s}^{0}}\]
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