Question

electronic configuration of Cr in s,p,d,f

Answer 1

this element has a special electronic configuration like this..

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Answer 2

The electron configuration of chromium is [Ar]3d54s1

Explanation:

The typical energy level diagram you see in text books showing the 4s below the 3d is ok up to calcium.

After that the 3d sub - shell falls below the 4s in energy but the difference is very small. Repulsive forces then tend to "push" electrons up into the larger 4s orbital where repulsion is less.

This is why the 4s electrons are lost first when the elements of the 1st transition series ionise.

This also explains why the electron structure of Cr2+ is [Ar]3d4.

The 4s electrons are the outer valence electrons which also define the atomic radius