The number of unpaired electrons in Cr $(a t o m i c n u m b e r = 24)$ is:

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Solution

The correct option is C 6
The electronic configuration of Cr is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5} 4 s^{1}$ . Half filled orbitals have a more stable configuration. Number of unpaired electrons is 6.

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