ATOMIC & NUCLEAR PHYSICS INORGANIC CHEMISTRY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site uranium (U) A billet of highly enriched uranium recovered from scrap processed at the Y-12 Facility in Oak Ridge, TN. Credit: US Dept of Energy A heavy, silvery-white, metallic element, radioactive, easily oxidized, and having 14 known isotopes of which uranium-238 is the most abundant in nature. Uranium occurs in several minerals, including uraninite and carnonite, from which it is extracted and processed for use in research and nuclear fuels. atomic number 92 relative atomic mass 238.03 melting point 1,132 °C (2,070 °F) boiling point 3,818 °C (6,904 °F) relative density 18.95 Related categories    • ATOMIC AND NUCLEAR PHYSICS    • INORGANIC CHEMISTRY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP