A Model for the Universe (7) -- The Atomic Nucleus and The Nuclear Species Having now at hand the model of the neutron as a combination of a proton and an electron into a new type of center-of-oscillation, a complex centeroscillating as a resultant of its components, a similar model is now available forthe atomic nuclei. In fact, such a model is essential. The "bunch of grapes"concept of the nucleus with its components, distinct protons and neutrons, simplywill not work. The problems with the "bunch of grapes" concept, whether the "grapes" (protons and neutrons) are closely packed or are a loose assembly in motionrelative to each other, are as follows. (1) The U-wave field (the electric field) of individual protons is partially blocked by the other particles in the nucleus (protons andneutrons). It is not possible to find a configuration of protons andneutrons as distinct entities, collectively constituting an atomic nucleus,where the full net positive electric field of the protons is present in alldirections simultaneously. Yet, of course, the full field simultaneouslyin all directions is required, if only for the sake of the orbital electronstructure.