On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table. He ...

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DMITRI IVANOWITSCH MENDELÉFF, who was born on February 7, 1834 (N.S.) and was for many years professor of chemistry at Leningrad, is chiefly remembered for the first clear and satisfactory enunciation ...

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