NEET Chemistry Quantum Numbers MCQ Question with Solution

Which of the following quantum numbers are correct for the outermost electron of sodium atom?

A

n = 4, l = 0, m = 0, s = +1/2

B

n = 3, l = 0, m = 0, s = −1/2

C

n = 3, l = 1, m = +1, s = +1/2

D

n = 3, l = 2, m = −1, s = −1/2

Option B

The outermost electron of sodium is in the 3s orbital, so n = 3, l = 0, m = 0, and s can be either +1/2 o $r^{-1}$ /2.

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