Name Uranium
Symbol U
Atomic Number 92
Atomic Mass 238.029 atomic mass units
Number of Protons 92
Number of Neutrons 146
Number of Electrons 92
Melting Point 1132.0 C
Boiling Point 3818.0 C
Density 18.95 grams per cubic centimeter
Normal Phase Solid
Family Rare Earth Metals
Period 7
Cost $40 per kilogram



Origin of Name From the planet Uranus
Date and Place of Discovery In 1789 in Germany
Discovered by Martin Heinrich Klaproth
Common Compounds
Interesting facts
  • Was used for dying pottery, when in natural form
  • The atomic bomb that was used at Hiroshima in World War 2, was uranium based
  • Can be found in low levels in all rocks
Common Uses
  • Ammunition
  • High density penetrators (military)
  • Ballast for re-entry aircrafts
  • Gyroscopic compasses
  • Fuel commercial nuclear power plants


Photo Courtesy of
Environmentalists for Nuclear Energy
Chemical Elements
Environmental Chemistry
Jefferson Lab

Uranium Atomic Structure Elements by Name Elements by Number Home