Safety in the laboratory; Naming, formulae, equations - chemical, ionic and net ionic; Atomic structure, isotopes, calculation of average atomic mass; Electronic configuration, stoichiometry, Avogadro’s number, moles, molarity, dilution, empirical formula, limiting reagent; Oxidation-Reduction reaction: oxidation number and electron transfer, half-reactions, balancing redox equations; Chemical bonding: ionic, covalent, polar covalent, metallic; Lewis diagrams, shapes of molecules; Periodicity; size, electronegativity, ionisation energy, metals, non-metals, metalloids; Gas laws: Boyle’s law, Charles’ law and ideal gas equation.