What is the formula for the arrangement of electrons in the orbit of an atom?

The formula for the arrangement of electrons in the orbit of each atom is, E = 2n ^{2} . Here n determines the number of orbits. For example: For

1st orbit, if n = 1, then E = 2n ^{2} = 2 × (1) ^{2} =

2 For 2nd orbit, if n = 2, then E = 2n ^{2} = 2 × (2) ^{2} = 4

For 3rd orbit, if n = 3, then E = 2n ^{2} = 2 (3) ^{2} = 18