Angular Momentum Quantum Number Definition

Diagram of a P Orbital
The angular momentum quantum number determines the shape of an electron orbital. p orbitals are the result of an angular momentum quantum number equal to 1. ACD Labs

Definition: The angular momentum quantum number, ℓ, is the quantum number associated with the angular momentum of an atomic electron. The angular momentum quantum number determines the shape of the electron's orbital.

Also Known As: azimuthal quantum number, second quantum number

Examples: A p orbital is associated with an angular momentum quantum number equal to 1.