Question

Which of the following is an example of the electrostatic force acting in an atom?
A. An electron repelling a proton
B. A proton repelling another proton
C. A neutron repelling an electron
D. A neutron repelling another neutron

Answer 1

B. A proton repelling another proton

Answer 2

B. A proton repelling another proton

Like charges of the protons would repel one another.

Note: Unlike charges would actually attract.

Option B is the correct one.