(Polar molecules, Non-polar molecules, etc.)
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If there are multiple regions of electron density (Say 5) and you have one lone pair of electrons, the shape would then be a seesaw. How do you know what the angles are for the bonds in the molecule? I know the lone pair would have some effect on the angle of the bond but I'm not really sure how to determine the effect of the electrons.
Lone pairs provide more repulsion than other atoms with electrons attached. Therefore the angles between the lone pairs and the atoms will be bigger than expected for the shape, and the angles between the atoms will be smaller because the lone pair pushes them closer together.