Questions/Atomic Structure/Why is the electroni...
Electronic ConfigurationAtomic Structure

Why is the electronic configuration of Chromium (Cr) 3d54s13d^5 4s^1 instead of 3d44s23d^4 4s^2 ?

Expert Answer

Half-filled dd -subshell ( d5d^5 ) provides extra stability due to symmetry and exchange energy

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