Final answer:
The angular momentum quantum number (l) indicates the shape of orbitals, with l = 0 representing an s orbital and l = 2 for a d orbital.
Step-by-step explanation:
The angular momentum quantum number, denoted by l, indicates the shape of the orbitals in an atom. A value of l = 0 indicates a spherical type orbital, commonly known as an s orbital. A d orbital, which has a more complex cloverleaf shape, is indicated by an l value of 2. The value of l is dependent on the principal quantum number n, such that it can range from 0 to n - 1. This quantum number is essential for determining the electron's spatial distribution and orbital shape within an atom.