Basic information, atomic structure, and isotopes.

Atomic structure, chemical and physical properties, and table of nuclides.

Basic physical and historical information.

Properties, uses, handling, and cost.

Physical data, chemical properties, health and environmental effects.

D. N. Sunderman (Battelle Memorial Institute, Columbus, Ohio). [PDF]

Data tables and historic information.

Image, general and physical information, source, uses, key isotopes, and ionisation energies.

Extensive information on history, uses, occurrence, compounds, and properties.

Properties of the element, including its history, applications, and charateristics.