Density of kcl the crystal structure of kcl is the same as that of naci, as shown in figure 3 of the notes on crystal structure (shackelford fig. 3.9, p 67). the density of kcl is 1.984 mg/m3 (g/cm3) a. what are the electronic structures of the k* and cl ions? b. what is the distance between the centers of neighboring potassium and chlorine ions? c. compare your answer in part (b) to what would be estimated from appendix two in shackelford; cl: atomic number k: atomic number 19; atomic radius 0.231 nm; ionic radius 0.133 nm nm; ionic radius 0.181 nm 17: atomic radius 0.107