Why do atoms combine? Why are only certain combinations possible? Why do molecules possess definite shapes? To answer such questions different theories and concepts have been put forward from time to time. In this fourth unit of class 11 chemistry, we can answer the above questions by learning Kössel-Lewis approach, Valence Shell Electron Pair Repulsion (VSEPR) Theory, Valence Bond (VB) Theory and Molecular Orbital (MO) Theory.
Curated by: Khan Academy India - English (42 videos)
According to valence bond theory, we can overlap atomic orbitals to form a bond. But then why do we need hybridisation? Can we predict the geometry of molecules using this simple atomic orbital overlapping? Let's find out the answers to these questions by taking the examples of ammonia and water molecules. 0:00: Introduction to VB theory 0:24: Limitations of VB theory 1:08: Geometry of ammonia using simple orbital overlap. 4:04: What is hybridisation? 4:39: Geometry of ammonia using hybridisation 9:21: Geometry of water using hybridisation Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Revathi Ramachandran