<P> Coulomb Energy . The electric repulsion between each pair of protons in a nucleus contributes toward decreasing its binding energy . </P> <P> Asymmetry energy (also called Pauli Energy). An energy associated with the Pauli exclusion principle . Were it not for the Coulomb energy, the most stable form of nuclear matter would have the same number of neutrons as protons, since unequal numbers of neutrons and protons imply filling higher energy levels for one type of particle, while leaving lower energy levels vacant for the other type . </P> <P> Pairing energy . An energy which is a correction term that arises from the tendency of proton pairs and neutron pairs to occur . An even number of particles is more stable than an odd number . </P> <P> A number of models for the nucleus have also been proposed in which nucleons occupy orbitals, much like the atomic orbitals in atomic physics theory . These wave models imagine nucleons to be either sizeless point particles in potential wells, or else probability waves as in the "optical model", frictionlessly orbiting at high speed in potential wells . </P>

Who suggested that the most of the mass of atom is located in nucleus