What is a binary ionic compound?

Answer:

Some molecules (not just ionic compounds) always tend to come in pairs. Aluminum oxide for example Al2O3 always comes in a pair Al4O6, the empty electron pairs on the Aluminum making attractive sites for the filled electron pairs on Oxygen to 'stick' to.

First answer by Wolfgang schwartzschild. Last edit by Wolfgang schwartzschild. Contributor trust: 533 [recommend contributor recommended]. Question popularity: 0 [recommend question].