Is it likely that a large atom (more than 40 protons) would exist (be found in nature) if it has the same number of protons & neutrons (1:1 ratio)? Explain.

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell