 Okay, so let's go ahead and write the electron configuration for oxygen. So everybody go ahead and write it down while I'm looking for mine. So oxygen is O right on the periodic table. So why don't you guys help me out and how I would write this electron configuration? One S. Oh, yeah, go for it. One S. Two SQ. And everybody else can help too. Two P4. Two P4, like that. Everybody okay with that? Does that make sense to everybody? Look where it is on the periodic table. Okay, so if I were to have given you this, you should be able to tell me this too, right? If I were to give you this or this, you should be able to tell me what the common ion of oxygen is. What's the common ion of oxygen? O2 minus, right? O2 minus, like that. Okay, so what if I asked you, let's write the electron configuration for O2 minus. What would you say? One SQ. Yeah, so help me out. One SQ. Two SQ. Two SQ. Two P6. Two P6. Does everybody agree with that? Okay, so everybody's cool with that. What if I asked you to write the condensed electron configuration of oxygen? Could you guys do that? Yeah. So, help me out. Let's do it. What is it? 18. Helium. Helium. Is that it? Two SQ. If I asked you to write the condensed electron configuration of O2 minus, what would it be? Helium. What would it be? Helium. Helium. Helium. Do you do the electron thing? That's it. Okay. That's the condensed electron configuration. Okay, so what if I asked, let's just do one more thing since I know you guys know. Well, let's kill this video. Does there any questions on this? We'll do a video on quantum numbers now.