 Okay, so this problem here has to do with naming of transition metal non-metal compounds. So transition metal ionic compounds in particular. So write the direct name for each of the following ionic compounds. Now here we've got iron and it's bonded to three chlorins. So you know that chlorine has a negative one charge, right? So it's C L minus. And if we've got three of those, then we've got minus three, something minus three. And you know that's going to equal zero, right? So what minus three equals zero, it must be plus three, right? Three minus three equals zero, right? So iron here must be iron three, okay? So it's iron hominemeral three, it's oxide, okay? So remember, oxygen is minus two, right? So we've got to do something. Minus two equals zero. What minus two equals zero plus two? Plus two minus two equals zero. It must mean that manganese here is manganese two, right? So it's going to be the manganese. This is also manganese oxide, okay? But it's not the same manganese as this one is, okay? Because you know that because there's different subscripts down here, okay? So we know again, oxygen is minus two, okay? Three minus twos is going to be what? Minus six, is that right? Three times minus two is minus six. And we know that's supposed to equal zero. So this must be plus six, right? So total, these must equal plus six, right? So since we've got two of them, then each one of them must equal three, right? So this is going to be manganese two, I don't know. Manganese three, okay? So let's just go back for a second. This is the what? Iron three plus, right? That interacts with three CO minuses, right? So this is the Mn two plus that interacts with one O two minus. This is Mn three plus, so you need two of them to interact with three O two minuses, okay? And here we've got silver and bromine. So bromine is a minus one, so this must be altogether zero. So silver must be plus one, okay? So it's going to be silver, wine, bromine. So like that, plus, so hopefully that clears everything up.