Dmitri Mendeleev Mendeleev, Dmitri (1834-1907): Russian chemist born at Tobolsk, Siberia. He studied science at St. Petersburg and graduated in 1856. In 1863 he was appointed to a professorship and in 1866 he succeeded to the Chair in the University. Mendeleev is best known for his work on the periodic table; arranging the 63 known elements into a Periodic Table based on Atomic Mass, which he published in Principles of Chemistry in 1869. He predicted the existence and properties of …showed first 75 words of 213 total…

…showed last 75 words of 213 total…any of the Noble Gases, however, which had not yet been discovered. Mendeleev anticipated Andrews' concept (1869) of the critical temperature of gases. He also investigated the thermal expansion of liquids, and studied the nature and origin of petroleum. He was considered one of the greatest teachers of his time. In 1890 he resigned his professorship and in 1893 became director of the bureau of weights and measures in St. Petersburg, where he remained until his death in 1907.