The periodic table of elements is an arrangement of elements in a tabular form. As much as it may seem to be final, it is far from it. As more and more elements are discovered, the table will keep on enlarging. But there is an history to the formation of the periodic table, where many minds have worked hard. Here we look at the theories of Johann Wolfgang Döbereiner , John Newlands , Dmitri Mendeleev’s and Henry Moseley. We discuss the theories , their advantages and disadvantages and complete discussion on the Modern Periodic Table.