Uranium is a dense radioactive actinide used as nuclear fuel and present naturally in rocks, soils, and seawater.
Atomic number
92
Category
Actinide
Period
7
Group
f-block
State
Solid
Fun facts about Uranium
Natural uranium is mostly uranium-238 with a small fraction of fissile uranium-235.
Uranium compounds can show several oxidation states and vivid colours.
Its radioactive decay contributes heat within Earth.
Common uses of Uranium
Nuclear power fuel
Dense counterweights and shielding
Geological dating
Where Uranium sits in the periodic table
Uranium belongs to the actinide series in period 7 and the f-block of the periodic table. Under the conditions represented in this reference, its state is solid.
Quick chemistry revision
For quick revision, pair the symbol U with atomic number 92 and the listed atomic mass 238.03. The summary, facts, and uses above keep those element properties together in one reference.