Let's do the electron configuration for strong fume. So, I know some of you have looked up there, I know, but it's alright. So, strong team is SR. Okay, so look for it on the periodic table. So, it's 38, right? So, you're looking for 38 electrons. Okay, so, let's write the electron configuration. Okay, so, how do we do it? We look at the periodic table. Let's write it together. What is it? 1s2. 2s2. 2p6. 3s2. 3p6. 4s2. 4s2. 4s2. 4s2. 4s2. 3d10. So, that's where it gets weird, right? So, 3d10. 4p6. 5s2. 5s2. 5s2. Okay, that makes sense, right? So, you can also, if you were like, okay, I don't know, count these up, right? And then you can figure out if it didn't tell you what is this atom, right? You count them up and figure out what atom is. Let's do the condensed electron configuration. Condensed, abbreviated, noble gas electron configuration. You'll hear it. All of those terms, they're interchangeable, okay? So, how do we do the noble gas configuration of an yellow? No, the number of gas. No, the number of gas. And then add the what? The valence. What is the valence electron? Yeah, the remainder electrons are called the valence, okay? So, what's the noble gas before shantium? Crypton. So, what's the number of gas? 4 shantium. Crypton. So, okay, R. And where are the valence electrons? So, all these are the inner electrons, right? Until where? That's right. So, those are all the inner electrons. And these ones here are the valence. So, what do we do? Write the valence level. Is everybody cool with that? Okay, so, let's predict the ion that strong team would make. What do you think it would make? SR2 plus, right? Why would you think that? Too weak. Because you got two valence electrons, okay? So, again, this is a common ion that did make. So, let's draw the condensed electron configuration for the common ion of strong team. What would it be? K-O. Okay. So, now let's draw what's called the orbital diagram for the valence electrons of strong team. Okay? So, the orbital diagram is where you write. So, for the valence, of course, we got crypton before that. So, all this is the valence. So, we got, if we look up, where strong team is, it's the 5S, 4D, 5P. Okay? So, 5S, 4D, 5P. So, that's the valence shell, right? Okay, but strong team doesn't fill all that up, right? So, strong team only has the two electrons. So, they're just going to go into the 5S. So, 1. And why don't they go up here? Because that's higher in energy than get just bumping with the guy next door. Okay? So, remember, they turn out. So, plus and minus 1. So, that's the electron or the electron partial orbital diagram for the valence electrons.