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)
In this video, we will have an insightful introduction to Molecular Orbital (MO) Theory explaining why it is crucial for understanding chemical bonding beyond simpler models. We will visualize how atomic orbitals interact, explore the energy implications of this interaction, and differentiate between bonding and antibonding molecular orbitals formed from s- and p-orbitals. By the end, you'll have a clear grasp of the fundamental criteria that govern molecular stability and properties through MO theory. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/class-11-chemistry-india/xfbb6cb8fc2bd00c8:in-in-chemical-bonding-and-molecular-structure?lang=en Timestamps: 1:00 - Previous theories on bonding 3:26 - Visualisation of orbital interaction 6:01 - Energy implications of interference. 9:15 - Bonding vs antibonding MOs from s- and p-Orbitals 12:10 - Summary of bonding and antibonding criteria 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 Aswin Vijayaraghavan