1. The problem statement, all variables and given/known data Which has the strongest ionic bond? Cs2Se AlN CaI2 Kbr 2. Relevant equations Look at electronegativities 3. The attempt at a solution I looked at electronegativities and found the differences. The largest difference was KBr. But apparently, that was wrong. See EN differences below. Cs2Se: 1.6 AlN: 1.5 CaI2: 1.5 KBr: 1.9 Ionic bond strength increases with increasing change in EN, correct? What am I doing wrong? Please advise if you can. Thanks in advance.