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

Options

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`

Answer

B

Explanation

`._(11)Na=1s^(2) 2s^(2)2p^(6)3s^(1)
For 3s^(1), n=3, l=0,m_(1)=0,s=-1//2`