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In 1680 Robert Boyle also discovered phosphorus, and it became public.In 1809 at least 47 elements were discovered, and scientists began to see patterns in the characteristics.In 1863 English chemist John Newlands divided the then discovered 56 elements into 11 groups, based on characteristics.
John Newland did the clasification of the periodic table and divided all the elements that were discovered by that time by groups
In 1886 French physicist Antoine Bequerel first discovered radioactivity. Thomson student from New Zealand Ernest Rutherford named three types of radiation; alpha, beta and gamma rays. And later that time the peroidic table was divided by the amount radiation the elemnts had.
In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.
Modern Periodic Table
Chemist Julius Lothar Meyer of Breslau University in Germany, while in the process of revising his chemistry textbook in 1868, produced a periodic table that turned out to be remarkably similar to Mendeleev’s famous 1869 version—although Lothar Meyer failed to classify all the elements correctly. But the table did not appear in print until 1870 because of a publisher’s delay—a factor that contributed to an acrimonious dispute for priority that ensued between Lothar Meyer and Mendeleev.
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