Quantum Numbers | Principal quantum number (n) \Azimuthal quantum number (ℓ) | Magnetic quantum number (mℓ) | Spin quantum number (ms)| Quantum theory.

Quantum numbers are values that describe certain characteristics of electrons in an atom. There are four quantum numbers: 1. Principal Quantum Number (n): Determines the energy level or shell of the electron. The principal quantum number (n) is one of the four quantum numbers used to describe the energy levels or electron shells of an atom. It indicates the main energy level or distance from the nucleus where an electron is located. The values of n are positive integers starting from 1, and they determine the relative energy of the electron and its average distance from the nucleus. As n increases, the energy level and distance from the nucleus also increase. 2. Angular Momentum Quantum Number (l): Specifies the sub-shell or orbital type (s, p, d, f). The angular momentum quantum number (l) is one of the four quantum numbers used to describe the properties of electrons in an atom. It determines the shape or type of subshell an electron occupies within a given energy level. The ...