Modern periodic law states that physical and chemical properties of the elements are periodic function of the atomic numbers i.e. if the elements are arranged in order of their increasing atomic numbers, the elements with similar properties are repeated after certain regular intervals. Atomic mass depends upon the number of protons and neutrons in the nucleus whereas atomic … [Read more...] about Modern Periodic Table
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Mendeleev’s Periodic Law And Table
He examined the relationship between atomic weights of the elements and their physical and chemical properties. Among chemical properties, Mendeleev mainly concentrated on the compounds formed by the elements with hydrogen and oxygen because they are highly reactive and hence formed compounds with almost all the elements. The formulae of the hydrides and oxides formed by the … [Read more...] about Mendeleev’s Periodic Law And Table