The total energy $\left(E_n\right)$ of the electron in the stationary states in the $n^{th}$ orbit of the hydrogen atom is:

The total energy (E_n) of the electron in n^th stationary state in a hydrogen atom is given by

${\mathrm{E}}_{\mathrm{n}} = -\frac{13.6}{{\mathrm{n}}^2} \mathrm{eV}$