Data tables and historic information.

Basic information, atomic structure, and isotopes.

Atomic structure, properties, and table of nuclides.

Basic physical and historical information.

Basic information and history.

Physical data, chemical properties, health and environmental effects.

Image, sources, biological role, key isotopes, and oxidation states.

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

Details the properties of the element, including its history, applications, and characteristics.