Elaborate on what the nuclear model of the atom indicates about the mass in the atom. a) it represents the atom as a small, dense negative center enveloped by a weighted cloud of positive particles. b) the majority of the mass of the atom is in the small, tightly packed nucleus surrounded by a diffuse cloud of electrons. c) the mass of the atom is uniformly distributed as the electrons, neutrons, and protons are distributed throughout the atom. d) atomic mass is evenly proportioned across the atom because the protons and neutrons are distributed throughout a sea of electrons.