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History of the Periodic Table During the 18th and 19th centuries a few chemists contributed to developing the periodic table to make it how it is today. During 1829 the chemist Johann Wolfgang Döbereiner drew attention to several groups of three elements, our of the 40 known, with very similar properties. At least 60 elements were known by 1864. During this time John Newland proposed a ‘law of octaves’. This law identifies many similarities among the ele