nevermind, I have found out that bigger ions have a bigger r value and thus via the inverse proportionality the higher lattice energy corresponds to the lower r value
I'm having some problems with the calculations associated with this problem:
Which compound in each of the following pairs of ionic substances has the most exothermic lattice energy?
(a) LiF
CsF
I know I need to use Coulomb's law, but I don't know how to calculate r...