Periodicity of the elements properties. Periodic system of elements.Prevalent
properties of non-metal elements and their compounds.Hydrogen, oxygen,air.
Water.The elements of 18-14-th group.Carbon chemistry.Hydrocarbons.Coal, crude
oil,natural gas,fuelling.Silikates.Chemical properties of metal elements,
preparation and production of them.The elements of 1-13-th group.
Macromolecular matters.Explosives.