Electronic books about the periodic table (Periodic Table) content on comparing the properties of metals, non-ferrous metals and semi-metallic properties of elemental analysis on the periodic table. For example, the introduction of some elements utilized appropriately according to the properties of elements. Describes the properties of radioactive elements and examples advantages and disadvantages of certain radioactive elements. Comparing nuclear fission and fusion. And examples of the use of nuclear energy in the future. Including their effect on living organisms and the environment.