 Help me with this one, if you want. So you have the complete electron configuration for virilium, OK? So virilium is VE. So how do you start it up? 1s, and how many is in the 1s orbital? Two of them, of course. And then what's next? 2s. Two. Why would you say two? Because virilium is number four, right? Should we do the other two as well while we're here? So nitrogen? Why don't you guys tell me? Two, three, three, three. Three, right? So notice here, we don't break them up into the x, y, c equation. So pump them all together. And then the last one, nA. So 1s2, 2s2, 2p6, 3s1. Hopefully you guys know how to do that. The thing that we also know about these is they have common ions, right? What's the common ion for virilium going to be? What do you expect its ion to be? Ion of virilium, guys. What is it supposed to be? Tell me. So virilium plus 2, right? VE plus 2, OK? So what would be electron configuration of that? 1s2, OK? So what's the common ion of nitrogen? You guys get it? So what is it? N, right? N, 3 minus, OK? So what is the electron configuration for that? 1s2, 2s2, 2s2, 2s2, 2s2, 2s2. Sorry, so what is it? 1s2, 2s2, 2s2. That's it. That's it? No, no, that's it. Sorry, I just couldn't hear what you guys were saying. 2p6. 2p6, right? No, if you guys, if you said that, then you were doing it right. I just couldn't understand. OK, so that's the common ion for nitrogen, right? So you guys see what's happening, right? So what did we do? We went from here and added those three electrons, right? We went from here, took away two electrons. And if you guys see that, that's how you write the common ion for the electron configuration. You guys probably know how to do this already. What about sodium? What's it going to be? What's its common ion? Plus 1. N, A, plus 1, right? And what's the electron configuration? So these two, you could say, are what of each other? What does that word? Iso-electron. The iso-electron. Same. Same electron configuration, yeah, OK. So slight, slight difference. Well, you can go over that later, but essentially. Any other questions? Any questions on this thing? OK, pretty good.