(Polar molecules, Non-polar molecules, etc.)
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The electron pair geometry is based on the number of regions of electron density around the atom (parent shape), while molecular geometry is the actual shape that includes bonding pairs and lone pairs.
Electron pair geometry refers to the arrangement of electron groups and takes into account the lone pairs in a molecule. However, molecular geometry takes into account the number of bonds AND the lone pairs. For example for NH3, the electron geometry is tetrahedral whereas the molecular geometry is trigonal pyramidal.
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