Quantifying Energy in an Electron-Proton System

[arkofnoah]

Homework Statement

An electron orbits a stationary proton at a distance of 5.29 x 10^-11 m.
(i) What is the kinetic energy of the electron?
(ii) What is the potential energy of the whole system?
(iii) What is the minimum amount of energy needed to separate the two charges to infinity?

Homework Equations

The Attempt at a Solution

Just a simple question:
(ii) In this system are there any other forms of potential energy other than the electric potential energy?

 

[Tusike]

I don't think so, since gravity is really weak compared to electric force, and the distance given is way out of range of the nuclear forces.

 

[arkofnoah]

okay thanks. just wanted to be sure