This Rule governs the distribution of electrons in different shells of an atom.

According to this rule, ” **the maximum number of electrons that can accommodate is given by 2n ^{2} rule**“.

Where n is the shell number

For K shell, n= 1 so, 2(1)^{2} = 2

For L shell, n=2 so, 2(2)^{2} = 8, and so on.