Concept:The azimuthal quantum number
l divides a shell into orbitals of different shapes.
Explanation:The principal quantum number
n simply gives the number of shells.
The azimuthal quantum number
l further divides each shell into subshells or orbitals such as
s,
p,
d, and
f.
The magnetic quantum number
ml only describes the orientation of orbitals within a subshell.
The spin quantum number describes only the spin of an electron.
Therefore, the shell is divided into orbitals by the azimuthal quantum number.
Answer:C. Azimuthal