(Polar molecules, Non-polar molecules, etc.)
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Lavelle mentioned in lecture that we don't need to draw them using the dash wedge diagram, just the lewis structures. You just have to be able to recognize the shape based off of how many lone pairs/bonding pairs.
the dash shows that the atom is farther away from you and the wedge shows that the atom is coming towards you. We do not need to draw the Lewis structures this way it is just helpful to visualize the 3d nature of molecules on a 2d surface. However, if you were to draw them this way, where the dashes and wedges were would matter because it may illustrate an incorrect 3d shape if you are drawing atoms on the wrong plane.
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