Some of them are- Kössel-Lewis approach, Valence Shell Electron Pair Repulsion (VSEPR) Theory, Valence Bond (VB) Theory and Molecular Orbital (MO) Theory. Let us take a look at the VSEPR theory.

This article talks about Valence Shell Electron Pair Repulsion (VSEPR) theory in detail. It also talks about different molecular shape. About 1-3 questions are being asked from this topic.