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...Sorina serban viewing periodical system with the help of microsoft access data base abstract as an expression periodic law structure created by mendeleev embodied many forms in time for present form table knowing electronic configuration each element and outermost electrons particular is great importance contains elements organized groups periods recently atomic numbers have been discovered most important properties are presented discovery natural state source use biological role physical number weight melting boiling point density electron affinity information on isotopes nuclei mass range life duration ionization energy aim this paper to a study program teaching purposes st nd application intended high school pupils year college students well thus they will enlarge perspective upon chemical keywords nonperiodic theoretical considerations also certain called that vary constantly example given their shells explains periodicity specific terms z ionic radius points there copyright facult...