Place the following in order of increasing magnitude of lattice energy. MgO LiI SrO
A) SrO

Question

Place the following in order of increasing magnitude of lattice energy. MgO LiI SrO
A) SrO < MgO < LiI
B) LiI < SrO < MgO
C) MgO < SrO < LiI
D) LiI < MgO < SrO
E) MgO < LiI < SrO

Quizplus · Accepted Answer

Lattice energy increases with the charge of the ions and decreases with the size of the ions. MgO has ions with higher charges (+2 and -2) compared to LiI (+1 and -1) and SrO (+2 and -2), but Sr is larger than Mg, making SrO's lattice energy lower than MgO's. LiI has the lowest lattice energy due to its ions being the largest and having lower charges.

Place the Following in Order of Increasing Magnitude of Lattice