Uranium U - Uranium Uranium oxide has been used since Roman times for yellow pigments in glass. The element was discovered in 1789 by a German chemist, Martin Klaproth, who named it for the newly observed seventh planet. Although only mildly radioactive, uranium compounds are toxic. The oxide is amphoteric.
Crystal are orthorhombic.
Click mass number for decay process, product for element page. 242.06315 MASS abund. This is not a publication of Phoenix College.