Atomic models made out of styrofoam balls are a classic science project in schools. Neon is a rare gas that is present in minute quantities in our atmosphere. With an atomic number of 10, it has 10 protons and 10 neutrons in its nucleus, which is circled by 10 electrons. In the neon atom model, styrofoam balls in different colors represent these atomic particles, and wire loops show the paths of the electrons.