Thulium (atomic number 69, symbol Tm) is a rare earth metal and chemical element that was isolated in 1879 by Per Theodor Cleve. The same method was used to isolate other elements, including terbium, erbium, and lanthanum. It was only in 1911 when pure thulium was isolated. This is a rare and expensive element which belongs to the group of lanthanides.
Properties, Compounds, and Isotopes
Thulium is ductile and malleable and has a silver luster. It has a hexagonal close-packed structure and three oxidation states - 4, 3, and 2. This element is solid at room temperature and has a...Read More