Which of the following ionic compounds would be expected to have the highest lattice energy?
A)RbF
B)RbCl
C)RbBr
D)RbI

Question

Quizplus · Accepted Answer

RbF is expected to have the highest lattice energy because lattice energy increases with the charge of the ions and decreases as the size of the ions increases. Since all options involve the same cation (Rb+) and different halide anions, the difference in lattice energy will be due to the anion size. Fluoride (F-) is the smallest anion among the given options, leading to a stronger attraction between the ions and, consequently, a higher lattice energy.

Which of the Following Ionic Compounds Would Be Expected to Have