Two goes into the one s orbital and one goes into the two s orbital. So now we're taking fluorine. Fluorine has nine protons, so it must have nine electrons for it to be a mutual atom. So that means two go into the one s orbital, two goes into the two s orbital and five go into our two p orbital. Okay, so what happens? Well, we set an ionic bond is formed between atoms that have low ionization energies and high electron athenity energy.