(Polar molecules, Non-polar molecules, etc.)
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If two molecules have the same VSEPR formula, then they have the same shape. From the formula, we can only estimate what the bond angle is, though they may vary a bit for different molecules. We can't find out the true bond angle with the VSEPR formula, that has to be found experimentally.
Basically there is the electron domain geometry and the actual shape of the molecule. The electron domain formula is AXn , where n is the number of domains. The number of domains includes both the lone pairs and the bonded pairs around the central atom. To determine the shape, the same basic concept is applied, except this needs to take into account the lone pairs and the bonded pairs, as the bond angles change depending on whether or not there is repulsion from a lone pair.
With VSEPR Models, molecules can have the same amount of electron densities. The difference in these molecules can lie in the angles between the bonds. For instance, trigonal pyramidals have different bond angles. Sulfite have O-S-O bond angles of 106 degrees while NH3 has H-N-H bond angles that are 109.5 degrees.
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