The angular momentum quantum number of an electron (l) designates the:

a. electron's main energy level

b. shape of the electron's orbital (cloud)

c. order of placement of electrons in the sublevel

d. electron's direction of spin

Question

The angular momentum quantum number of an electron (l) designates the:
    		
 a.   electron's main energy level
    		
    b. shape of the electron's orbital (cloud)
    		
   c. order of placement of electrons in the sublevel
    		
    d. electron's direction of spin

nechirwan · Answer

It is also called the azimuthal quantum number, indicated by ℓ. It indicates the energy sublevel, and has values from 0 to n-1. 

ℓ ....... sublevel 
0 ....... s 
1 ....... p 
2 ....... d 
3 ....... f