Which of the following compounds are properly classified as ionic? (select all that apply)
The Attempt at a Solution
My initial choices were MgCl2 & K2O ... however, since this was incorrect (it didn't tell me which were correct or incorrect - the entire problem was either correct or incorrect)... I'm guessing that HOCN and NH4NO3 might also classified as ionic.
If this is true, what is the general criteria for recognizing ionic compounds (if the compound has more than 2 types of atoms)?