So low ionization energies. That means that very little energy is required to take this electron away from the outermost shell, while this flooring atom has a high electron affinity, which means that it is very likely that it will gain an electron. So what happens is one of these electrons found on the outermost shell is removed, and this electron is placed on the outermost shell in the two p orbital of the fluorine atom. And now what happens is, since this still has three protons, but it now has two electrons, this develops a positive charge. While this Fluorine atom, which Had Nine protons, nine Electrons, now has nine protons, ten electrons. So it develops a negative charge.