See also:
Sites:
- ChemGlobe: Promethium
- Electronic, thermal, and steric data along with an isotope table.
- ChemicalElements.com: Promethium
- Basic information, atomic structure, and isotopes.
- EnvironmentalChemistry.com: Promethium
- Atomic structure, chemical and physical properties, and table of nuclides.
- It's Elemental: Promethium
- Basic physical and historical information.
- LANL: Promethium
- History, sources, uses, and properties.
- Lenntech: Promethium
- Physical data, chemical properties, health and environmental effects.
- Visual Elements: Promethium
- Image, animation, source, uses, and ionisation energies.
- WebElements: Promethium
- Extensive information on history, uses, occurrence, compounds, and properties.
- Wikipedia: Promethium
- Properties of the element, including its history, applications, and characteristics.
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Last update: 8:00 PT, Wednesday, January 13, 2010
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