See also:

• Science: Chemistry: Elements: Alkali Metals  (2)

• ChemGlobe: Francium - Electronic, thermal, and steric data along with an isotope table.
• ChemicalElements.com: Francium - Basic information, atomic structure, and isotopes table.
• EnvironmentalChemistry.com: Francium - Atomic structure, chemical and physical properties, and table of nuclides.
• It's Elemental: Francium - Basic physical and historical information.
• LANL: Francium - Basic information and history.
• Lenntech: Francium - Physical data and chemical properties.
• Visual Elements: Francium - Image, general and physical information, and key isotopes.
• Wikipedia: Francium - Properties of the element, including its history and characteristics.