Neon, like all noble gasses, has a valence shell in perfect equilibrium, and it takes a lot of energy to disturb that equilibrium. It also takes very little energy to restore that equilibrium, so noble compounds and ions are very unstable. read more
The Bohr model is a very simple one, unfortunately it only works for hydrogen-like atoms. Since there are more than one electron in a neon atom, you need to use an approach that takes into account the very complicated electron-electron interaction. read more