Data tables and historic information.

Basic information, atomic structure, and isotopes.

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

Basic physical and historical information.

History, sources, properties, uses, and compounds.

Physical data, chemical properties, and health effects.

Image, animation, source, uses, and physical information.

Extensive information on history, uses, occurrence, compounds, and properties of the element.

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