Which of the following requires the smallest energy to separate the ions?

Question

Quizplus · Accepted Answer

The energy required to separate ions in an ionic compound is related to the lattice energy. Lattice energy decreases with increasing size of the ions and decreasing charge. KI has larger ions (K+ and I-) with a +1 and -1 charge, respectively, which results in the lowest lattice energy among the options, thus requiring the smallest amount of energy to separate the ions.

Which of the Following Requires the Smallest Energy to Separate