Elements
- 442
- USGS Minerals Information: Titanium
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- 443
- WebElements: Titanium
- Extensive information on history, uses, occurrence, compounds, and properties of the element.
- 444
- Wikipedia: Titanium
- Properties of the element, including its history, applications, and characteristics.
- 447
- USGS Minerals Information: Tungsten
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- 448
- WebElements: Tungsten
- Extensive information on history, uses, occurrence, compounds, and properties.
- 449
- Wikipedia: Tungsten
- Properties of the element, including its history, applications, and characteristics.
- 452
- It's Elemental - Isotopes of the Element Uranium
- Has an extensive list about the isotopes of uranium. Gives mass number, half life, branching percentage, and decay mode of the isotopes.
- 454
- Radioactive Byproducts of Depleted Uranium (Uranium-238)
- Shows the byproducs of depleted uranium and shows their half-lives.
- 455
- Uranium-235 Chain Reaction
- Shows examples uranium reactions in fission, as well as data about those reactions.
- 456
- WebElements: Uranium
- Extensive information on history, uses, occurrence, compounds, and properties.