What happens to electrostatic potential energy of a two electron system, if one electrons brought towards another electron?

Potential energy of electron present in He^(+) is:

Calculate the electrostatic potential energy of two electrons separated by 3 Å in vacuum?

Potential energy of electron present in He^(+) is :

In above Q., the potential energy of the electron is:

What happens when an electron gains energy ?

What will happen to the potentail energy of the system ? If (i) Two same charged particles are brought towards each other (ii) Two oppositely charged particles are brought towards cach other

The electrostatic potential energy between proton and electron separated by a distance 1 Å is

The electrostatic potential energy between proton and electron separated by a distance 1 Å is