NECTA Form 1–4 (CSEE) · Form 2 · Chemistry (Form 2) · Notes · Unit 5: Valency, Oxidation Numbers, Chemical Formulae & IUPAC Nomenclature

Unit 5: Valency, Oxidation Numbers, Chemical Formulae & IUPAC Nomenclature

Official NECTA CSEE Form 2 Chemistry Subtopic 2.4: Fundamental definitions of valency and radicals, comprehensive table of mono-, di-, and trivalent polyatomic ions, the 7 fundamental IUPAC oxidation number rules with step-by-step calculations, cross-over method for chemical formulae, reference matrix of 30 standard and hydrated salts (with water of crystallization), systematic Stock notation for transition metals, Greek prefix naming for covalent oxides, and balancing chemical equations based on conservation of mass.