Question

The size and energy of the main shell is given by ________ quantum number​

Answer 1

Answer:

The quantum number n is called the principle quantum number. You already know this as shell. The shell "K" has been given the value n = 1, the "L" shell has been given the value n = 2. The principle quantum number serves to determine the size of the orbital, or how far the electron extends from the nucleus.

Answer 2

Answer:

principal quantum number