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Mendeleyev (1834 - 1907) 
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Dimitry Mendeleyev was a Russian Chemist who was born in Tobolsk, Siberia in 1834. He is best known for his development of the Periodic Table that provides a listing of all known elements, their categories, and specific information related to each. The first version of this table was published in 1869. Two years later, Mendeleyev published a revised version, but there were still several gaps for elements that were unknown. As time progressed, and the unknown elements were discovered, he received great praise for his scientific work. Mendeleyev also did experimentation into the expansion of gases by heat and into the makeup of petroleum. |