The strong nuclear force binds protons and neutronsin a nucleus.It is evident that without some attractive force, a nucleus will be unstable due to the electric repulsion between its protons . Tis attractive force cannot be gravitational since force of gravity is negligible compared to the electric force .A new basic force must therefore,be invoked .The strong nuclear force is the strongest of all fundamental forces,about 100times the electromagnetic force in strength.
The charge -independent and acts equally between a proton and a proton ,a neutron and a neutron and a proton and a neutron .Its range is however extremely small of about nuclear dimensions (10^-15)m.It is responsible for the stability of nuclei.The electron ,it must be noted ,does not experience this force.
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