Full text of the monograph by E. M. Scadden (U.S. Naval Radiological Defense Laboratory, San Francisco, California). [PDF]

Basic information, atomic structure, and table of isotopes.

Basic physical and historical information.

Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

Data tables and historic information.

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

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

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

Physical data, chemical properties, health and environmental effects.

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