The correct set of quantum numbers for the unpaired electron of chlorine atom is

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n=2 l=1 ml=0

n=2 l=1 ml=1

n=3 l=1 ml=1

n=3 l=0 ml=0

answer is C.

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Detailed Solution

Electronic configuration of chlorine is 3s2, 3p5∴ Unpaired electron is found in 3p sub-shell.∴ n = 3, l = 1, m = 1

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