Description: (Swedish Chemist Best Known for His Discovery of the Chemical Elements 'Holmium' and 'Thulium')
Per Teodor Cleve, a Swedish scientist, is known for discovering the elements holmium and thulium. He earned his degrees from Uppsala University and became a professor of chemistry, specializing in general and agricultural chemistry. Cleve's theory that didymium was two elements was later confirmed by Carl Auer von Welsbach. Additionally, he made important discoveries in aminonaphthalenesulfonic acids and contributed significantly to biological and oceanographic studies during his career. Cleve passed away at the age of 65.