(Polar molecules, Non-polar molecules, etc.)
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Hello! Square planar is with regards to molecular geometry/arrangement, that is, it considers the lone pairs and how their repulsion affect the bond angle. However, tetrahedral is with regards to the shape of the molecule, only considering the atoms and not the lone pairs.
Also, in the example we did in class with XeF4, this is a square planar because it has 4 bonding pairs plus 2 lone pairs while a tetrahedral only has 4 bonding pairs, such as CH4. XeF4 has 6 regions of electron density while CH4 has 4 regions of electron density, which can also play a role in the molecule's shape.
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