Question

The magnetic quantum number of valence electron of sodium $(Na)$ is:

• A. 3
• B. 2
• C. 1
• D. 0

Answer 1

Answer: (D)

0

Answer 2

Na (atomic number $=11$ ) $=1 s^{2}, 2 s^{2} \,2 p^{6}, 3 s^{1}$ For $3 s^{1}, n=3, l=0$ and $m=0$