A new atom configuration was developed, based on proton and electron as electric monopole pairs deducted from “the theory of spin vector in motion” developed by us recently, and symmetry of group theory. New proton and neutron structures were proposed based on quarks’ mass and spin properties. According to proton and neutron’s configuration proposed, we concluded that the radioactivity of nucleus shall result directly from the electric repulsive force induced by symmetry breaking resulted from extra neutron(s) of an isotope. Based on inner structures of proton and neutron, we concluded that there is no “strong” force required to bond quarks in proton and neutron, the fused proton or neutron’s empty carriers or containers is the Higgs particle.

atom configuration, electron, proton, electric monopole, quarks, Higgs particle, strong force