 So let's go ahead and try to identify this period two element by its excessive ionization energy, OK? So recall, you have to be given the line of ionization energies. And in this case, they're in megatools per mole. Remember, this is ionization energy one. So ionization energy two. So this is how much does it take to take the first electron, second electron, third electron, OK? Five, ionization energy six. So what we're looking for now, so what are we looking for now, the big jump, right? The big jump. So where is it? There? So that one, no. That one, no. Yes, much bigger. Yes, so it's really obvious. In fact, if you look at the chart, you could, I mean, I guess nothing in chemistry is really obvious. I shouldn't say that's probably not the best way to say it, but hopefully it'll stand out to you, I guess, is the best way to say it. So then you just put your line there. So look for the big jump, put your line, and then say, well, we're looking for a period two element. So this is x plus, x two plus, x three plus, x four plus. So then this would be x five plus, right? So in between x four plus and x five plus, we went down to the noble gas. So since we're in period two, the noble gas configuration that we got to was helium. Not that that matters too much, but. And then we identified, well, what element must it have been? So helium plus one, two, three, four electrons, right? So helium, one, two, three, four. This thing must be carbon. Is everybody OK with that? So the element, does that answer your question? OK, wonderful. So again, I think that the main concerns were, are we going to get some numbers on the exam? Yeah, you have to have the numbers on the exam in order to do this. You won't have this whole chart because it'll give you all of this other information too, but you will have all of these numbers, successive ionization energies. You're going to have to know what they mean, know that you're going to look for the big jump, and so on and so forth. So what exactly determines what element is? It's wherever the big jump is. That's where the noble gas is. And so you just count from that how many electrons you took away. So helium plus one, two, three, four is carbon. Yeah, because you're taking away electrons. So that's going to the left, right? So if it is period three, you would use neon. Yeah, you would want to get to neon eventually, yeah. And in fact, I've recorded a couple of those for you. And in fact, I think that they might even be the problems that are on. Are there any other questions on this? But yeah, so I guess the real question is I have to give you that it's a period two element or a period three element or a period four or whatever. Any other questions on this? OK, good.