The quantum number which tells about the angular momenta of the different electrons present in an atom is called........

Explanation

To solve the question regarding the quantum number that describes the angular momentum of electrons in an atom, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Quantum Numbers**: Quantum numbers are sets of numerical values that describe the unique quantum state of an electron in an atom. There are four quantum numbers: principal (n), azimuthal (l), magnetic (m), and spin (s).

2. **Identify Angular Momentum**: The angular momentum of an electron in an atom is associated with the azimuthal quantum number (l). This quantum number defines the shape of the orbital and is crucial for determining the angular momentum of the electron.

...