Nuclear force facts for kids
Nuclear force is the force between nucleons. It is the force that pulls protons and neutrons into atoms. It is very hard to break the bond, or tie, between protons and neutrons in an atom, because nuclear force holds them together. When the bond is broken, this is called nuclear fission.
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Force (in units of 10,000 N) between two nucleons as a function of distance as computed from the Reid potential (1968). The spins of the neutron and proton are aligned, and they are in the S angular momentum state. The attractive (negative) force has a maximum at a distance of about 1 fm with a force of about 25,000 N. Particles much closer than a distance of 0.8 fm experience a large repulsive (positive) force. Particles separated by a distance greater than 1 fm are still attracted (Yukawa potential), but the force falls as an exponential function of distance.
Nuclear force Facts for Kids. Kiddle Encyclopedia.