Unit 4

Unit After studying this Unit, you will be able to understand Kössel-Lewis approach to chemical bonding; explain the octet rule and its limitations, draw Lewis structures of simple molecules; explain the formation of different types of bonds; describe the VSEPR theory and predict the geometry of simple molecules; explain the valence bond approach for the formation of covalent bonds; predict the directional properties of covalent bonds; explain the different types of hybridisation involving s, p and d orbitals and draw shapes of simple covalent molecules; describe the molecular orbital theory of homonuclear diatomic molecules; explain the concept of hydrogen bond.