(Polar molecules, Non-polar molecules, etc.)
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We got to memorize the basic angles like 90, 120, and 180 and we should be able to predict if they are greater than or less than these angles. We don’t need to know the unique ones. I just imagine what the molecule looks like in a 3D setting based on the name of the shape.
This chart from step up was really helpful for me. Besides that, I think if you just understand the shapes, you'll probably be able to figure out the angles just by dividing 360 by the number of bonds.
I would say memorize all the basic ones. There are a few that he told us we don't need to know due to the fact that it varies per molecule (i believe they were the ones with lone pairs). So i would memorize all of the ones without lone pair and have a good understanding of how to predict the ones with lone pairs.
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