(Polar molecules, Non-polar molecules, etc.)
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I think it would be better to understand how the shapes correspond to different AXE forms rather than simply memorize them. Some are nice, like trigonal planar. You know that if you have 3 regions of electron density around the central atom, then they all need to be equally spaced from each other (360/3 = 120). Some, like tetrahedral, may better be memorized.
I find knowing how the actual shape looks like to be really helpful as it gives a clue onto the shape's name. For example a trigonal planar (AX3) looks like a triangle on a single plane, while a square pyramid (AX5E) looks like a pyramid with a square base if you connect the atoms (not the lone pairs) to create a 3D shape.
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