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Atoms Section 3

Added Feb 19, 2019 •

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hey what's up section 2 Section 3 section 3 section 3 all about the electron Arrangement everything about the electron all right outside the nucleus and they are in have to do how close they are to the nucleus or how far away from something doesn't take much energy to the electron take a lot of energy to overcome the positive proton electron the close to the nucleus they have low energy and to get further and further away from the nucleus they have to have a lot of energy so let's write that down so the farther away from the nucleus electron is the more energy it has ancient energy level Can Only Hold certain amount of electrons have a maximum amount of electrons that they can hold so that's right both of those down really accurate portrayal of how they and let's write this down charms in each energy level electrons have a negative charge that that is the first energy level can hold second 8:18 and 4:30 to your energy increase in energy go out further away from that pool of the positive charge on there you go electrons electrons are going to occupy the lowest energy level or orbital 30 grams come from the guy who came up with this model of the atom Niles Bohr and he came up with these to show the energy levels of the atom the Bohr diagram show every the atom has the lithium table is number 3 on the periodic table which means it has three protons three positive proton and also a regular reactive state has three electron and so what we do is like we saw in the previous Slide the first energy level can only hold two electrons so you put to their nose have the least amount of energy closest to the center Chalmette is this is what we call are we can go ahead and write this down is the outermost or electron those are called valence electron I write that down the ones the outermost electrons in each energy level I called that one selection helium on the periodic table has 2 protons 2 electrons and so you see it only has one that would have to have another interview already and then if we were to draw element which is around Richard beef and then sodium has 11 that we have 10 and then the last one so there is that all right I just did hydrogen Boron and silicon restaurants near electron in the properties of that element the properties of that element such as is it going to bond with certain things like everything in group readily or easily bonds with everything 17 because it has that one valence electron we'll talk more about that in class as well so here we got me this is important to know the periodic table has one valence electrons president is not really part of group 1A does only have one valence electron Arby's Chicken very different amounts 677 and what do you do except in that group is because the most you can have in your outermost energy level I have a full outer energy level and helium only has two but in that first energy level you can only have two and so it has eight valence electrons each group hat now try to look at a periodic table and group sodium send group whatever you think about 100 electrons in boron 1370 North Route 7 6 7 and 8 or 7 either way but it's really just the number that's not one 1 to 13 for kids just like that alright Lewis Dot Diagram only Lewis Dot Diagram group one only has one valence electron in group 2. Surround Group 13 boron carbon has four what you want to do when your side until every side has more and then you start 1 2 3 I'm in the most so will drop out and show how other elements bond with them using the car before you can put a second one if you want to write this down you can let me know what's a good step step procedure Max number. Can I more than eight electrons in the outside Road said that already all right fill up the lowest energy level what is a subshell alright so we have energy energy level has certain subjects and those sub shells can hold certain amount of electrons as well these electrons are all over the place and technically you can't ever know exactly where so fat basically meme that the electron can be assumed to be found within that General location 99% of basically this is where you're probably going to find an electron I don't know. She'll has orbitals you do need to write this down and orbital is a general region where an electron is very likely to be found in a subshell electrons do not work they don't orbit in and out in orbit orbit is a predictable it elliptical path you don't have to just write this box writer just write that box there are different types of subshells and orbitals each type of sub show has a different shape and electron configuration what's wrong electronic configuration electron configuration for a different video and have probably quite a few videos

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Atoms Section 3

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