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 I'm currently in a college-leveled Chemistry course. We're talking about electron configuration and I just do not understand how to do it. I can get to 1s22s2 and after that, I'm lost. Help? [Quote] [Link]
 OmnipotentEntity Administrator636 Posts11 Vigeo 0:2 - 19.56.16805.467 days ago Hydrogen = 1s1 Helium = 2s1 Lithium = 2s11s2 Beryllium = 2s12s2 Boron = 2s12s21p2 Argon = 2s12s26p2 Sodium = 2s12s26p21s3 The electron configurations generally follow the periodic table (with some minor inconsistencies). [Quote] [Link]
 oh, so that's how you Americans do it. We mark it as KnLnMnNn Anyways, there are four things to keep in mind: a) no electron can be in more than one whatever-you-call-them (the s1, s2, etc.), so the sum of all the 'n's must be equal to the number of electrons the atom has (in most cases, Z, or 1 for H, 2 for He, etc.) b)the final whatever-you-call-them has all the valance electrons, so the number of electrons in it = the number of valance electrons (topology, yes, but it's easy to forget this) c) the first "s1", or K, as I would call it, has 2 spots where electrons can go, the next 8, and I can't remember the rest, though if you're just starting to learn about this, you probably only need this. The second-to-last s always has the number of electrons "left over" from the previous 's's, minus the number of valance electrons. (1 for group 1, 2 for group 2, 3 for 13, 4-14 5-15 6-16 7-17, and I haven't yet learned about the rest: I'm only in 8th grade) d) you can't add any electrons to the next 's' if all the previous ones aren't filled (the exception is the last 's', which must hold all the valance electrons) If anything is unclear, please tell me what, and I'll try to rephrase it. [Quote] [Link]
 OmnipotentEntity said:Hydrogen = 1s1 Helium = 2s1 Lithium = 2s11s2 Beryllium = 2s12s2 Boron = 2s12s21p2 Argon = 2s12s26p2 Sodium = 2s12s26p21s3 The electron configurations generally follow the periodic table (with some minor inconsistencies). Erm. So, how do I know what one's will be? I'm so sory. >__< My teacher has tried and tried to explain this to me, but I just don't get it. [Quote] [Link]
 I'll try to make a metaphor using platform flash games: you have a few boxes if you push them over a hole, they fall in now, imagine you have 4 such holes. The first has a depth of two, so if you keep pushing all the blocks forward, two of them will fall in and the rest will move on. 8 will fall in the next hole, and then the metaphor is useless for the last two. P.S.-you might not have read my previous post, I'm pretty sure we posted almost simultaneously. Make sure to scroll up. [Quote] [Link]
 Yeah, they must have gone through at the same time. Thank you so much! :) [Quote] [Link]
 You're welcome BTW, are you saying that in the US, you don't cover electron configuration before college? I mean, I know they don't teach as much in mandatory schools there, but the electron configuration? When do you learn about the structure of an atom, then? [Quote] [Link]
 You're welcome BTW, are you saying that in the US, you don't cover electron configuration before college? [Quote] [Link]
 ciacho0000 said:You're welcome BTW, are you saying that in the US, you don't cover electron configuration before college? I mean, I know they don't teach as much in mandatory schools there, but the electron configuration? When do you learn about the structure of an atom, then? It's covered in very basic terms. In the state I live in, Chemistry isn't even a required course to graduate. While it is learned in basic Chem, it's really glossed over as something you need to know how to read, not know how to write. [Quote] [Link]
 anywhere other than here I would have made a giant facepalm in the direction of the US, but I won't. [Quote] [Link]
 My state is one of the worst, to be honest. Tax cut after tax cut after tax cut has left us far behind most other states. [Quote] [Link]