Q.

Which is a possible set of quantum numbers for a valence unpaired electrons in ground state atom of phosphorus (Z = 15)

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a

b

c

d

answer is D.

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Detailed Solution

(P)15 1s 22s22p63s23p3Valence unpaired electrons are in 3pValence unpaired electrons are in 3pThus,          n = 3                   l = 1                   m = -1, 0, + 1                   s = +12 or −12
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Which is a possible set of quantum numbers for a valence unpaired electrons in ground state atom of phosphorus (Z = 15)