question_answer

Which of the following electronic configuration is correct for chromium?

A)  \[[Ar]\,3{{d}^{4}}4{{s}^{2}}\]                     

B)  \[[Ar]\,3{{d}^{5}}4{{s}^{1}}\]

C)  \[[Ar]\,3{{d}^{4}}4{{s}^{1}}\]                    

D)  \[[Ar]\,3{{d}^{5}}4{{s}^{2}}\]

Correct Answer: B

Solution :

This electronic configuration is correct due to extra stable half-filled electronic configuration.