Question

Repulsion between closely packed protons in the nucleus is overcome by

Answer 1

The strong nuclear force overcomes the electromagnetic repulsive force.
(the strong nuclear force is about 137 times stronger than the electomagnetic force at subatomic distances!)

Answer 2

Strong nuclear force

Step-by-step explanation:

As we know that positive charges repel each other so protons do repel each other although atoms are stable because of strong nuclear force acting between nucleons (protons and neutrons in nucleus are called nucleons) which overcome the repulsive force between the proton. Strong nuclear force is very short-range force and acts only in distance of angstrom or picometre.