Which of the following compounds has the highest lattice energy?

Which of the following compounds has the highest lattice energy?

Step 1: Understand what lattice energy is. It is the energy released when ions come together to form a solid ionic compound.
Step 2: Know that lattice energy increases with the charge of the ions. Higher charges mean stronger attractions between the ions.
Step 3: Know that lattice energy decreases with the size of the ions. Larger ions are further apart, which weakens the attraction.
Step 4: Compare the charges of the compounds: MgO has Mg(2+) and O(2-), NaCl has Na(1+) and Cl(1-), KBr has K(1+) and Br(1-), and CaF2 has Ca(2+) and F(1-).
Step 5: Identify that MgO has the highest charge (2+) compared to NaCl and KBr (1+) and CaF2 (2+ but larger size).
Step 6: Conclude that MgO has the highest lattice energy because it has the highest charge and is not larger than CaF2.

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