Introducing chemistry; atoms, ions and molecules; the structure of the atom; amount of substance and the mole; chemical formulae and chemical equations; introduction to periodic chemistry; interatomic bonds; intermolecular bonds; energy and energy changes; states of matter; chemistry, industry and the environment I; acids, bases and salts I; solubility, titrimetry and qualitative analysis; nuclear chemistry; electrons in atoms; hybridization and bonding; introduction to the chemistry of carbon compounds; functional group chemistry - alkanes; petroleum; rates of chemical reactions; equilibrium; acids, bases and salts II; redox reactions; uses and effects of redox reactions; periodic chemistry - period 2 and 3 and group 7 elements; periodic chemistry - the transition elements; chemistry, industry and the environment II; alkenes, alkynes and benzene; alkanols and alkanoic acids; amino acids, natural and synthetic polymers; revision questions; answers to self-check questions. Appendices: safety symbols; relative atomic masses; periodic table of the elements; WAEC-adapted IUPAC nomenclature for some inorganic substances; WAEC-adapted IUPAC nomenclature for some organic substances; structure of organic compounds; finding the structure of an organic substance once it has been purified; displayed and structural formulae; classification of organic compounds; buffer solutions.