Description: (Finnish Physicist, Chemist, and Mineralogist Who Achieved Popularity for His Description of Yttrium)
Johan Gadolin was a Finnish physicist, chemist, and mineralogist. He achieved popularity for his description of yttrium, the first rare-earth element. Johan Gadolin is also remembered for his service as a professor at the Royal Academy of Turku, where he became one of the first chemists to give laboratory exercises to students.