Question

The electronic configuration of chromium (Cr²⁴) written as [Ar] 3d⁴ 4s² . Is it correct ? Give reason​

Answer 1

Answer:

Electronic configuration of Cr is [Ar]3d5 4s1, instead of the expected [Ar]3d4 4s2. This is so because half filled d orbitals have extra stability. So in case of Cr, one electron from the 4s orbital goes to the 3d orbital to make it half filled, and Cr