 Okay, let's do a little review of Vesper theory before we go any deeper into organic chemistry. And again, this is a review, so it should be fairly, I don't know, straightforward for you when we start discussing it, okay? So remember H2 hydrogen. Hydrogen is a diatomic gas, and we know that not only because we've memorized it, but we can look at the periodic table, and we know that hydrogen has the one electron, right? Each one of those hydrogen atoms has an electron, are atoms stable, how, how do atoms become stable again? Can you guys remind me? No, we'll get a configuration. Yeah, they get a noble gas configuration, right, or their whole valence shell is built, right? That's another way of saying that. So, is hydrogen's valence shell filled if it's just a hydrogen atom? Uh-uh, how many electrons does it mean? Which means two, right? So if we look at hydrogen, and I've got, I just got all this information from the periodic table, right? Because hydrogen's on the, you know, furthest leftmost row, right? So that means it's only got the one electron. And we know that neon, which is our helium, sorry. Helium is the noble gas that is trying to be configured like. And helium is two electrons. So we know that hydrogen wants the one extra electron, okay? So remember, instead of one of these hydrogens giving up an electron and the other one taking it, what they'll do is share electrons. So you guys remember that, right? So that's called, do you guys remember what that's called, the sharing of electrons between two atoms? A covalent bond, yeah, very good. And you remember when we were doing Vesper theory, how we kind of described it by showing arrows, we showed these things called fissure arrows, they were the motion of one electron? Let's remember how to do that. Why don't you guys do that on your own? And I'll do it up here. So you'll have to show them, meeting and meeting each other. And then instead of, you know, a lot of times, especially in older literature, you'll see this kind of, you know, representation of it. So you can think of it going from here to here to here. But nowadays we kind of skip over that and just say that that shared electron pair is this covalent bond. And we show that bond by a line in between those two atoms. Everybody's cool with that, right? You guys remember how to do that. So if we looked, right, we could build, and you can see I've got a few structures that I've already built here. We've got hydrogen here that I've built, the bond line structure of hydrogen, essentially, which is what we've built there, right? That's the bond line structure. We learned that. No more pleasure. Last time. So we can show the molecular structure through molecular models, okay? So that's hydrogen gas. And you can see I can turn it like that. I can turn it like that. It's still hydrogen. I can turn it around, okay? So what I'm saying like that is if I wanted to, I could have represented it like that. And it's the same molecule, okay? I'm just turning kind of on my head or on my side, whatever. Okay, but that's the skeletal structure of hydrogen. So that's what it looks like, atoms and bonds, okay? But we can, there's, of course, a bunch of different types of models, sex and kids. And you can see here where the atoms are emphasized and not the bonds, okay? Here's a different type of a model. You can compare that to the last one we showed, which is like just the skeletal structure, okay? And then there's, of course, these things called space building models, which if you wanted to think of what hydrogen really looked like, it's like this, okay? So it's just these two, you know, atoms that are kind of overlapping, okay? So what we would say is if we wanted to talk about the molecular geometry of hydrogen and any of these diatomic gases like fluorine, chlorine, bromine, nitrogen, et cetera, they're all going to be linear, okay? Why? Because, of course, there are two atoms that are in a line. If we ask bond angle, there's no bond angle here because you've got to go from a bond to a bond. And if you start here, there's no other bond. Is everybody cool with hydrogen? Can I kill this video? Are there any questions about this one? Okay, so this is essentially the easiest or the most simple structure you can build, I guess I should say. The most simple molecule that can be built, okay? No question?