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The strong nuclear force performs this task. It is stronger than the other forces but only over a very short distance, outside of which it is practically zero. It is like a well.

This is interesting because I have noted that when people learn about the nature of charges and the forces between they often also learn about basic atomic structure. Howver, even though such discussions are not esoteric topics, it is very rare for a student to ask how all of those protons manage to not only stay in the nucleus with their like charges, but far more compactly than the electronically bound electrons. Always seemed like a natural question for people who were really paying attention.

It's called the STRONG nuclear force.

The 4 fundamental forces are:

gravitational

electromagnetic

strong nuclear

weak nuclear

if you wanna know more you can google it, I don't like to copy and paste paragraphs of info

The residual strong force, or nuclear force, is responsible for keeping the hadrons in the nucleus together. It is strong enough to overcome the electromagnetic force's tendency to cause like charges to repel each other. It is not one of the fundamental four forces. The strong force only works on elementary particles (quarks and gluons), and the weak force only directly effects left-handed leptons and quarks. EDIT: See the second of my sources (CERN) for a simpler explanation.

It's called the strong force

its the strong nuclear force. and if you dont trust wikipedia like many people here is a link to the full information.

http://aether.lbl.gov/www/tour/elements/stellar/st...

It is the nuclear force

these are short range strong attractive nuclear forces.