Which quantum number describes the shape of an orbital?
A
Azimuthal quantum number
B
Magnetic quantum number
C
Spin quantum number
D
Principal quantum number
Correct Answer: Option A — Azimuthal quantum number
Explanation:
The azimuthal quantum number, also called the angular momentum quantum number, determines the shape of an electron's orbital such as s, p, d, or f. It ranges in value from 0 to n-1 for a given energy level.