Which of the following sets of quantum numbers represents the 19th electron in chromium (z=24)?

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4,0,0,1/2

4,1,−1,1/2

3, 2, 2, 1/2

3,2,−2,1/2

answer is A.

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Detailed Solution

19th electron of Cr goes to 4s orbital. Hence quantum numbers are 4, 0, 0, ±1/2.

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