Place the following in order of decreasing magnitude of lattice energy. K₂O Rb₂S Li₂O A) Li₂O K₂O Rb₂S B) Li₂O Rb₂S K₂O C) Rb₂S K₂O Li₂O D) Rb₂S Li₂O K₂O E) K₂O Li₂O Rb₂S

Question

Place the following in order of decreasing magnitude of lattice energy. K₂O Rb₂S Li₂O A) Li₂O > K₂O > Rb₂S B) Li₂O > Rb₂S > K₂O C) Rb₂S > K₂O > Li₂O D) Rb₂S > Li₂O > K₂O E) K₂O > Li₂O > Rb₂S

Quizplus · Accepted Answer

Lattice energy increases with the charge of the ions and decreases as the size of the ions increases. Li+ is smaller than K+ and Rb+, and all compounds listed are ionic with the same charge, so Li2O has the highest lattice energy, followed by K2O, then Rb2S.

Place the Following in Order of Decreasing Magnitude of Lattice