Bohr model hydrogen potential energy

[muffintop]

Homework Statement

How do you find the potential energy of the hydrogen atom in n=11 state using
Bohr model? express in eV

Homework Equations

I used U= -kZe^2/r

The Attempt at a Solution

=-8.99e9(1.6e-19)^2/5.29e^-11
=4.35e^-18J / 1.6e^-19
=-27.2eV

 

[Redbelly98]

You have used r for the ground state (n=1), and have found the potential energy of the ground state.

You'll need to use r for the n=11 state.