Consider the table below showing several properties of four representative elements, potassium, calcium, sulfur and chlorine, all from period 4 of the periodic table. Notice that the ionization energies of the nonmetals and the electron affinities of the metals have not been included.
|Atom||Ionization Energy (kJ/mol)||Electron Affinity (kJ/mol)||Atomic Radius (pm)||Most Stable Ion||Ionic Radius (pm)|
(2) + 532
Which of the following would have the smallest exothermic lattice energy?