# Do the neutrons in the atom's nucleus keep two or more protons from moving apart?

At short ranges (and nuclear ranges are short, $\cong {10}^{-} 15 m$), nucleons, protons and neutrons, engage in the strong nuclear force, one of the four known, fundamental interactions. This is approx. ${10}^{2}$ times stronger than the electromagnetic force (and it needs to be, why?).