Question

________ quantum number describes the size and energy of the shell.

• A. Principal
• B. Magnetic
• C. Spin
• D. Angular momentum

Answer 1

The correct option is A Principal

Quantum numbers indicate the probability of finding an electron in the space around the nucleus. The different types of quantum numbers are principal, angular-momentum, magnetic and spin.

The principal quantum number determines the overall size and energy of an orbital. It is denoted by "$\text{n}$". The possible values of n are 1, 2, 3, and so on.