Electronic, thermal, and steric data, along with a table of isotopes.

History, uses, production, and properties.

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

Physical data, chemical properties, and health effects.

Extensive information on history and properties.

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

General and physical information, source, key isotopes, and ionisation energies.

Data tables and historic information.

Basic information, atomic structure, and table of isotopes.

Basic physical and historical information.