Which ionic compound would be expected to have the highest lattice energy al203?

Al2O3: since magnitude of the lattice energy depends on the charge of the cation

and the charge of the anion. The Al ion has the greatest charge, namely +3.

let that person have a turn to speak : )

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.