Stability of Fully Filled and Half Filled Orbitals
The correct g...
Question
The correct ground state electronic configuration of chromium atom is:
A
[Ar]3d54s1
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B
[Ar]3d44s2
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C
[Ar]3d64s0
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D
[Ar]4d54s1
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Solution
The correct option is A[Ar]3d54s1 Exactly half filled orbitals are more stable than nearly half filled orbitals. Cr (At. no. 24) has configuration [Ar]3d5,4s1