Symbol
U
Atomic Number
92
Atomic Mass
238.02891
Protons
92
Neutrons
146
Electrons
92
Type
Actinide
Isotopes
Uranium-234, Uranium-235, Uranium-238
Discovery Year
1789
Discovered By
Martin Heinrich Klaproth
Group
3
Period
7
Boiling Point
4131°F
Melting Point
1132°F
Electron Configuration
[Rn] 7s² 6d¹
Density (g/cm³)
18.95
Crystal Structure
Orthorhombic
Magnetism
Paramagnetic
Abundance in Earth's Crust
0.0002%
Phase at Room Temperature
Solid