Question

Four quantum numbers of cl
n=?
l=?
m=?
​

Answer 1

Explanation:

Chlorine, [Ne]3s23p5 , n=3 straightaway because that is the highest energy level here, and since the outermost electron is in the p orbital, this is the same as l=1 . ml can be −1,0,+1 , but since there are 5 electrons, you count five, so −1,0,+1,−1,0 , which means the last electron has ml=0 .

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