 So let's name these transition metal polyatomic ion complexes, okay? so Well, how do we go about doing this? Well, remember transition metals We don't know what their charge is because they have very variable charges. So we have to Do it by inference of what the charge of the polyatomic ion is everybody okay with that? So in order to do these if you don't know the charge of your polyatomic ion you're kind of up a creek You know you got to remember these charges. So I only gave you a list of I think maybe Less than ten I think polyatomics for the first exam for you guys to memorize. So please go ahead and do that But a few of those are listed here. So I'll just go through this one myself. So you guys don't have to remember them right now the better before the weekends over so the sign I approve is CN minus so it only has a one minus charge, okay? So when So if we've got two of them, right then that that must mean there's two minus charges Is everybody okay with that form of logic? So that means to counterbalance think must have Plus two charge right or two plus. So since that's the case and seems to transition metal We call it zinc two. So everybody okay with that? so think and then to Is the Roman numerals? I think to Sign, you just put the name of the following So same thing here the sulfate and I Oh for Okay, so two times two minus is four months, right? So this is going to be titanium for Sulfur so Mercury is the so if you didn't know HD is mercury is that's one that you might want to remember Mercury is a transition metal. So Sulfur has a regular charge. We should all know that by now if we look up there. It's minus two, right? so Here it's saying it's taking two Mercury's to counterbalance that charge. So what would it be mercury? What? Can anybody tell me one one right mercury one, okay? So Why because this is going to be s2 minus? So we have to have something Like that And this particular one is going to be a sulfide Okay, why do we change the end because it's not a polyatomic on on those regular Anions we drop the ending the suffix and put our new suffix IDD to indicate that it's now a Anna as opposed to the happen itself, okay, and Acetate down here has a minus one charge Okay, so this whole thing is the polyatomic, right? So that thing has a minus one two of them So it's minus two overall this one's copper if you didn't know okay, so copper to acetate Well, you guys will learn For the next exam is that HD to Two plus is actually another polyatomic ion that I want you to remember. It's the mercury one