Electronic, thermal, and steric data along with an isotope table.

Basic information and history.

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

Physical data, chemical properties, health and environmental effects.

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

Data tables and historic information.

Basic information, atomic structure, and isotopes.

Atomic structure, properties, and table of nuclides.

Basic physical and historical information.

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