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Carleton College

University of Maryland - University College

University of Kentucky

Numerade Educator

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So for our first set of amount diagrams, let's look at the one for lithium to So let's recall that Livia as an electron configuration of one as Thio Thio one. And so that means that we will be using an atomic orbital for the one s and an atomic orbital for the two s and combining these together to create a new set of molecular orbital. And so when you draw molecular orbital diagrams, you want to have one Adam on the left. So for a dye atomic molecules, one on the left and one on the right and in this case we simply just have to lithium atoms. And then we want to draw the atomic corals based on energy. And so for these diagrams, we know that energy increases from the bottom to the top. And so we have. They want us orbital, as seen by the Elektronik variation and a two s orbital. And we also know that we have the same where they looked in and they're both identical in terms of energy. And we also know that when we draw the molecular orbital diagrams, the number of molecular Orgel diagrams should add up to the total number of atomic Orbital's participating in Be Dora. And so that means that because we have two atomic orbital's for one lithium and two for the other lithium, that means that we need four in total for the molecular world diagram. So we have 123 and four. And when we draw these diagrams, it's useful to indicate the type of molecular or roles that were making from the atomic orbital's. And so these two are from the one s, and these two are from the to us. And while we also make molecular orbital diagrams, we also need to live with them. And so we know that in this case we're using us atomic orbital's. And so we make Sigma Star and Sigma. And so this is Sigma Single star and this is Sigma and this is single stock and we also need to add our electrons and so we can see that we have three valence electrons in total to in the S and one in the to us, and so we can draw them here and then from there we can fill up the molecular oral diagrams based on the number of electrons that we have on the left and right side. So in the same way that the total number of molecular orbital's should add up to equal the number of atomic orbital's participating, we also need to make sure that the number of electrons in our ML diagram should match the numbers from the Atomic Corporal's in. So in this case, we have three electrons while the left and through on the right. And so that means we need six electrons in Romo dagger. And so we can simply feel this like so and so. This would be the M o diagram for the lithium, because we are combining the valence electrons together to fill up the molecular oral diagram and so we can see that we form a single as well, leasing the star and a sigma for the second energy level.