Question

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

• A. 3
• B. 2
• C. 1
• D. 0

Answer 1

Answer: (D)

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