A program, that contains a Periodical Table of Elements with many very good features: you can get nearly all the information on each element, even find out who is the explorer of the element. You can find the year when the element was explored, it`s half-life, density, boiling point, melting point, electronegativity, ionizationenergy, oxidation station, valency and oth..; it includes a table of dissolubility of acids, bases and salt in water; production of solubilityof little soluble in water electrolyts; examples of covering atomic orbits; electronic configuration and valency of Lanthanoids and Actinoids (there you can find electronic configuration of outer level and so on) Besides that you can get a lot of information on chemistry. Also we would like to say that our future products will include more information on the subject.