- Britannica Nobel Prize: Polonium
- Overview and basic data.
- ChemGlobe: Polonium
- Electronic, thermal, and steric data along with an isotope table.
- ChemicalElements.com: Polonium
- Basic information, atomic structure, and table of isotopes.
- EnvironmentalChemistry.com: Polonium
- Atomic structure, chemical and physical properties, and table of nuclides.
- It's Elemental: Polonium
- Basic physical and historical information.
- LANL: Polonium
- Sources, properties, uses, and isotopes.
- Lenntech: Polonium
- Physical data, chemical properties, health and environmental effects.
- Visual Elements: Polonium
- Image, general and physical information, source, uses, key isotopes, and ionisation energies.
- WebElements: Polonium
- Extensive information on history, occurrence, compounds, and properties.
- Wikipedia: Polonium
- Properties of the element, including its history, applications, and characteristics.
- Radiochemistry of Polonium
- Full text of the monograph by P. E. Figgins (Mound Laboratory, Miamisburg, Ohio). [PDF]
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