Protons are positively charged and repel other protons. which other particle is found in the nucleus and separates protons so that the strong force can hold the nucleus together?

Explanation:

It is known that each atom consists of three sub-atomic particles which are protons, neutrons and electrons.

And, inside the nucleus of an atom, there will be only protons and neutrons. Whereas electrons revolve around the nucleus of an atom.

Protons hold a positive charge, neutrons hold no charge and electrons hold a negative charge.

As due to the like charges of protons they tend to repel each other but a force stronger than the force of repulsion helps in binding the protons and neutrons together.

This force is known as nuclear binding energy.

Therefore, we can conclude that neutrons are the other particles which is found in the nucleus and separates protons so that the strong force can hold the nucleus together.

the answers would be

the first one and the second one