Final answer:
The VSEPR theory is used to predict the molecular geometry and bond angles of molecules based on the arrangement of electron pairs around the central atom.
Step-by-step explanation:
The VSEPR theory is used to classify molecules by predicting their molecular geometry and bond angles based on the arrangement of electron pairs around the central atom. According to the theory, electron pairs in the valence shell of a central atom will arrange themselves to minimize repulsions between them by maximizing the distance between each pair.
For example, if a molecule has two bonding pairs and no lone pairs, it will have a linear geometry with a bond angle of 180 degrees. On the other hand, if a molecule has two bonding pairs and one lone pair, it will have a bent or V-shape geometry with a bond angle less than 120 degrees.