What force holds neutrons and protons together in an atomic nucleus?

It is nuclear binding energy that holds an atomic nucleus together. (Some science teachers insist it's called the strong nuclear force, which is not quite correct. ) Nuclear binding energy is this nuclear force that overcomes the repulsive electrostatic force of the protons, which is acting to try to push the nucleus apart.

The nuclear binding energy is created from what is called mass deficit. When an atomic nucleus is fused, all the protons and neutrons in that nucleus give up a small amount of their mass, and this mass is converted into the binding energy that holds the nucleus together. And if you guessed that an atomic nucleus has less mass than the sum of the masses of its constituent protons and neutrons, the nucleons, you would be correct We sometimes call the binding energy nuclear glue, and it is derived from the stong nuclear force or strong interaction.

That also gives rise to another term used for nuclear binding energy, and that is residual strong force The reason we say that nuclear binding energy is derived from the strong interaction is that the stong interaction actually holds individual protons and neutrons together. It is the strong interaction that binds quarks and gluons together into individual protons and neutrons. And it is in nuclear fusion that the strong interaction mediates the creation of the binding energy to hold a newly fused nucleus together Links are provided below, and by using them, you can surf on over to relevant Wikipedia articles.

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