 Exactly. Okay, so remember, bond line structures, these aren't even more condensed than condensed structures, right, even, but they also show the bond angle information, okay, where the condensed structures don't. But there's a lot of implied stuff with these bond line structures. And we went through serotonin last time, so I think if I point to these, this molecule is called cyclohexane, you know, it's a common molecule. If I point to the different points on this molecule, I expect you to tell me what type of atom it is and what type of atoms are attached, okay? So, what type of atom is there? Carbon. Carbon. And how many carbons are attached? Two. Two. How many hydrogens? Two. Two. Two. Right? Why? Because carbon has to have four bonds, right? That's the first rule of organic chemistry for you to learn, okay? If you haven't learned it yet, carbons, if you put five bonds to carbon, automatically work. Okay? Automatically work. Okay? There are cases where it can have three bonds, but you guys aren't going to see them in introductory chemistry. You've got to get into organic chemistry before you'll see them, okay? So, what about there? What atom is that? That's not an atom at all, right? Okay? So that's a bond, okay? What about there? Ladies. What is it? Right? So make sure you guys know that. Since you guys told me you knew it all, you know? Didn't raise your hand, didn't do anything, you know? So make sure you know it if you don't know. How many hydrogens are attached? Two. What about there? How many hydrogens? Two. There? Two. So what's the molecular formula of this molecule? Six H4. Very good. So I think Brandon got it first, right? C6H4. What about this one? Do we figure out some of the stuff about this? What about this? Is that an atom there? It's a carbon atom. How many hydrogens does it have bondage to it? Zero. Zero, right? How many carbons does it have bondage to it? Two. Two, right? How many oxygens? One. Just one, but it's a double bond to oxygen. So it's kind of a trick question because we haven't talked about double bonds and triple bonds yet, okay? But I do want you to know that if you ever see that, right? You know that there's four bonds to that carbon, okay? But if I say how many oxygens, don't say two, okay? This is just one, okay? It's two bonds to oxygen, but only bonded to one. Okay, so what about here? Carbon. Carbon? How many hydrogens? Two. None. None. This one? One. How many hydrogens? Three, right? What about here? We already did that one, right? What about there? One. How many hydrogens? One, right? What about here? How many hydrogens? How many bonds are shown to that carbon already? Two. So how many does it have bondage to it? Two, okay? So what about that carbon? Zero. Zero hydrogens, right? Why did you already see four bonds? What about that carbon? Three. Three, right? Okay, this one? Two hydrogens. Two hydrogens, right? This one again? One. One hydrogens. Which way is it pointing? It's back. It's back. What's the bond angle here? Point five. You guys remember what the bond angle is here? From Vesper theory chapter? It's a good guess, though. I mean, it's a guess. One of four points. There's three, right? And they're in a plane. You know what that's called? That molecular geometry is called? Trigonal planar. How's that? Do you know the angle? No. 127. When you cut a pie in half, or in three pieces, the most you can have is, or that angle is 120. Okay? What about this bond angle here? 120, yeah. 120 as well, I assume you're saying. Not 122, right? No, I said 120 as well. And then this one? What about, so there's a hydrogen there, right? What about the bond angle there? What about this bond angle here? 120. What about this bond angle here? 109, point five. What about this bond angle? All of those bond angles. Okay? Any questions? Any questions? Everybody's just going to look at me funky and not ask a question, huh? Just say no if there's no questions. No, okay, cool.