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See also:
- 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.
