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Question

Please follow the Aufbau principle, Pauli exclusion principle and Hund's rule to determine the four quantum numbers (principle, angular, magnetic, spin) for the final electron of Scandium.

A
3,2,2,+1/2
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B
5,1,0,1/2
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C
4,0,0,1/2
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D
4,1,1,1/2
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Solution

The correct option is C 3,2,2,+1/2
Scandium has electronic configuration of [Ar]4s23d1 thus last electron belongs to 3d orbital for which n=3,l=2,ml=2,1,0,1,2 (any one),ms=1/2 or 1/2
thus option A is correct

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