 Okay, so which one of these compounds is covalent and which ones are ionic? So remember between non-metals and non-metals are covalent compounds and between metals and non-metals are ionic compounds. So if you see here, and it doesn't matter how many of the atoms you have together, okay? So you see here we've got C6 and H6. So there's two atoms, two different types of atoms here. They're both non-metals, so this is a covalent compound. Okay, here you find barium nitride, okay? Barium is a metal, nitrogen is a non-metal, right? So this is the ionic compound, BR2. So what is that, what does that look like? It looks kind of like BR, BR, right, the bond between them. So BR is a non-metal, BR is a non-metal, so it's a covalent compound. Any diatomic element is a covalent compound, any diatomic element is a covalent compound. Here we have aluminum, which is a metal, oxygen, which is a non-metal, aluminum oxide, this is an ionic compound. All ferric acid, this is a weird one, okay? Because it's got three different atoms in it. But all three of those atoms are non-metals, right? So this must be covalent compound. That's it, that's it. I have a question for that one. Okay.