Answer to Question #208865 in Atomic and Nuclear Physics for Sushil Kumar Rana

Question

What will be the energy of the 5th orbit of hydrogen atom if the energy of the 1st orbit of this atom is 13.6 eV?

Answer 1

Gives

energy of $1^{st}$ orbital H-atom

$E=13.6ev$

n=5

Now

We know that

$$E_n=-\frac{-13.6}{n^2}=\frac{-13.6}{5^2}=-0.544eV$$

$E_5=-0.544eV$