Learning target 2.18, I can name myonic compounds. Actually, I'm only going to teach you how to name binary compounds. Okay, so binary compounds are ionic compounds that just have two elements. Okay, or two charges of plus and minus. Okay, and rate. So how do we name an ionic compound? We name an ionic compound by combining the names of the two elements that make up the compound. Really simple. Okay, so here's how it works. Step one, the ion with positive charge is placed first. This usually is your metal. Step two, ion with negative charge. Your anion is placed second. This is usually your non-metal. Usually, I'll go into an exception in just a moment. Three, change, or add the suffix. I-D-E at the end of your negatively charged ion. Okay, so that's about it. It's really simple. I'm not going to go over the transition metals and how to name that. But please ask your teacher if you have questions on that. Okay, so an example, two examples, right, just right off the bat. We've heard of NACL, that's sodium chloride. Note the IDE at the end. Note that the metal is first, the non-metal second. And here's another one, calcium oxide. So here, just take a note that oxygen, it's not oxygenide. That's a little bit ridiculous. So what we do is we drop a gen, and then we add id. And the last one, just for future reference, or just to sort of solidify what you guys know. The aluminum, right, the first one. And the second one is fluoride. Do you care about the subscript? Don't worry about the subscripts. About subscripts. Anionic. No, they don't do anything in ionic. Now, here's the tricky part. And that's something that's a polyatomic ion. I'm just going to write it here, but we'll go over what that looks like. Okay, so here's a key. Note if the anion is a polyatomic, or the, or the cation for that matter. Polyatomic ions write them as they are named. Don't change to id. Okay, let's go over two examples. I'm going to write this down. We're going to try CACL2. Sorry, that's my dog. CACL2. So step one was to write the ion with the positive charge first. That would be calcium, right? This one's the positively charged one. This one's the negatively charged one. Oh my god. Ducking. Ducking. Okay, so sorry, that's calcium. So I'm going to write that first. The second step is to figure out the one with the negative charge, which is CL2, and that's chlorine, right? And the final step is going to change the ending of your negative charge one to id. So that's chloride. I'm going to drop the ion. So all of this together, you have calcium. All right. How do you know if it's a positive or a negative charge? Right, remember, usually the metal is first and the non-metal. This second, so use your periodic table. Now, take a look at the next example. Ducking. I'm trying to record here. Relax. Relax. Hey. Damn. Apologies. Okay. Take a look at this one. You're probably thinking, wait a minute, there is more than two elements here. You're right, that's an issue. But the last note I wrote down was that if you have a polyatomic ion, you're going to write it as it is. So let's go ahead and break this down. BA is barium. That's my positive charge. You should probably know about your polyatomics. So the S04 is a polyatomic ion. The charge in that is minus. So now you treat this as the whole anion, treat this as the whole cat ion. So, hmm. Step one. Let's go ahead and try it. Step one is the cat ion first, which is barium. Step two, as we said in the note, if it's a polyatomic ion, you write it as it is. So I'm looking at the negative one. S04 is sulfate. And step three, change the ending. But don't change the ending because it's a polyatomic ion. Therefore, this is called barium sulfate. Right.