Image, physical information, key isotopes, and ionisation energies.

Includes the history of the element, and a data sheet.

Basic physical and historical information.

Basic information, atomic structure, and isotopes.

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.

Basic information and history.

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