Why is as orbidalfilled before 3dorbidal – InterviewSolution

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1.

Why is as orbidalfilled before 3dorbidal

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this is because N+L value of 4s is less than 3d.N+L value of 4s is 4 and N+L value of 3d is 5.so 4s orbital is filled before 3d

4s is less than 3d so 4s orbital is filled before 3d

S orbit contain only 2elecrons is less then 3d orbit

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