ChemicalElements.com: Uranium
Basic information, atomic structure, and isotopes.
EnvironmentalChemistry.com: Uranium
Atomic structure, chemical and physical properties, and table of nuclides.
Lenntech: Uranium
Physical data, chemical properties, health and environmental effects.
Radioactive Byproducts of Depleted Uranium (Uranium-238)
Shows the byproducs of depleted uranium and shows their half-lives.
UIC - Uranium & Nuclear Power Information Centre
The UIC web site is to assist public understanding of uranium mining and nuclear electricity generation.
WebElements: Uranium
Extensive information on history, uses, occurrence, compounds, and properties.
Wikipedia: Uranium
Properties of the element, including its history, applications, and characteristics.