(Polar molecules, Non-polar molecules, etc.)
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In order for the amount of repulsion to be minimized, the distance between bonding pair should be maximized, that is, keeping the bonding regions of electrons as far apart from each other as possible. Unlike Lewis structure that is 2-dimensional, VSEPR model is actually 3-D, allowing bonding regions of electrons to be distributed equally in 3 dimensions, in order to minimize the amount of repulsion. Therefore, after symmetrical distribution of bonding regions of electrons in 3 dimensions, the bond angels are all 109.5 degrees.
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