And that means if we go back to Coulomb's Law, if our atomic radius increases, that means the difference between Q one and Q two or the protons and electrons increases. So our R also increases. And if there are increases, our denominators increase. And that means our force is less. So as we go down a group, our ionization energy tends to decrease. So to wrap up, basically, the higher your ionization energy is, the less likely you are to give up electrons.