Question

Values of magnetic orbital quantum number for an electron of $M$-shell can be:

• A. $0,1,2$
• B. $-2,-1,0,+1,+2$
• C. $0,1,2,3$
• D. $-1,0,+1$

Answer 1

The correct option is B $-2,-1,0,+1,+2$

Values of magnetic orbital quantum number for an electron of M-shell can be $-2,-1,0,+1,+2$.
For M-shell, $n=3$, $l=0,1,2$ and for $l=2$, m can be $-2,-1,0,+1,+2$.