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The four quantum numbers of the valence electron of potassium are:
(1) 4, 1, 0 and 1/2
(2) 4, 0, 1 and 1/2
(3) 4, 0, 0 and +1/2
(4) 4, 1, 1 and 1/2
Ans: 4, 0, 0 and +1/2
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