See also:

• Science: Chemistry: Elements: Actinides  (2)

» ChemGlobe: Actinium - Electronic, thermal, and steric data along with an isotope table.




» ChemicalElements.com: Actinium - Basic information, atomic structure, and isotopes.




» EnvironmentalChemistry.com: Actinium - Atomic structure, properties, and table of nuclides.




» It's Elemental: Actinium - Basic physical and historical information.




» LANL: Actinum - Basic information and history.




» Lenntech: Actinium - Physical data, chemical properties, health and environmental effects.




» Visual Elements: Actinium - Image, sources, biological role, key isotopes, and oxidation states.




» WebElements: Actinium - Extensive information on history, uses, occurrence, compounds, and properties.




» Wikipedia: Actinium - Details the properties of the element, including its history, applications, and characteristics.