CHEMISTRY GRADE 9 UNIT 5 LESSON 3 LEWIS FORMULA OF IONIC COMPOUNDS

Definition and Scope of Chemistry Relationship between Chemistry and Other Natural Sciences The Role Chemistry Plays in Production and in the Society Some Common Chemical Industries in Ethiopia MEASUREMENTS AND SCIENTIFIC METHODS Measurements and Units in Chemistry Chemistry as Experimental Science STRUCTURE OF THE ATOM Historical Development of the Atomic Theories of Matter Fundamental Laws of Chemical Reactions Atomic Theory Discoveries of Fundamental Subatomic Particles and the Atomic Nucleus Composition of an Atom and the Isotopes PERIODIC CLASSIFICATION OF ELEMENTS Historical Development of Periodic Classification of the Elements Mendleev’s Classification of the Elements The Modern Periodic Table The Major Trends in the Periodic Table CHEMICAL BONDING Chemical Bonding Ionic Bonding Covalent Bonding Metallic Bonding