Which compound should have the largest lattice energy?

Name: Which compound should have the largest lattice energy?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Lattice energy is directly proportional to the charge on the ions and inversely proportional to their radii. Among the given options, MgO has the highest charge on its ions (+2 and -2) and the smallest ionic radii, hence it should have the largest lattice energy. The other options have smaller charge on their ions and/or larger ionic radii, leading to lower lattice energies.

Which Compound Should Have the Largest Lattice Energy