millions (protons?) are electrostatically attracted to each other. Sodium chloride ¡V written as NaClm but still empirical formula. Crystal Lattice ¡V the repeating arrangement of ions in an ionic compound. Factor that determine shape/size of cl: opposite charges attract, like charges repel; size of cation/anion. The structure also depends on the difference in charge, little difference, little pull, high difference, high pull, making the atom smaller, how many ions. D. Properties of Ionic Compounds. 1. These are general properties. Definite crystallin
             ...