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People: Bohemond II of Antioch

Major breakthroughs in chemistry occur in 1803, …

Years: 1803 - 1803
Major breakthroughs in chemistry occur in 1803, with the identification of the elements rhodium and palladium (by William Hyde Wollaston); osmium and iridium (by Smithson Tennant); and cerium (by Wilhelm Hisinger, Jons Jakob Berzelius and Martin Heinrich Klaproth).