Mass and its properties and structure. Structure of atom. Electron cloud. Basic chemical terms. States of matters. Chemical bond. Energetical changes on chemical reactions. Dispersion systems. Rate and equilibrium of chemical reactions. Electrolytic dissotiation. Oxidation-reduction reaction. Periodic system of elements. Hydrogen, oxygen, water, air. Prevalent properties of non-metal and metal elements and thier compounds. Carbon chemistry. Silicon and its compounds. Lanthanides, actinides.