(Polar molecules, Non-polar molecules, etc.)
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You can think of molecular geometry as all the bonded regions in a molecule. Then you can think of electron density geometry as all the bonded regions and the lone pairs in the molecule. These will be the same if there are no lone pairs in the molecule.
Molecular geometry is used to describe the actual shape of the molecule given. Electron geometry is specific to the electron pairs or groups in relation to the central atom; it's basically the geometry of the electrons in a molecule.
The electron density geometry does take into account all the bonding and lone pairs linked to the central atom. Molecular geometry only takes into account of the bonds that are actually attached to other molecules. If there are no lone pairs, these shapes are the same.
In reference when making VSEPR models, it is important to note that electron density geometry affect molecular geometry, specifically the bond angle. As a general rule of thumb, the more lone pairs the more "pressure" these lone pairs will exert on the geometry.
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