Answer:
nucleus is a small structure located inside the cells of eukaryotic organisms. The cell nucleus is actually one of the defining characteristics of eukaryotes, as the structure allows cells and organisms to reach a very high level of complexity.
protons in the atomic nucleus is what determines the atomic number of an element, as outlined in the periodic table of the elements.Protons and neutrons, each with masses of approximately one atomic mass unit, are collectively referred to as "nucleons".
the neutron is a subatomic particle an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus.
The electron is a subatomic particle, with a negative elementary electric charge.Electrons in atoms exist in spherical shells of various radii, representing energy levels. The larger the spherical shell, the higher the energy contained in the electron.
