| 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. |
| Polonium: Data tables and historic information. |
| Radiochemistry of Polonium: Full text of the monograph by P. E. Figgins (Mound Laboratory, Miamisburg, Ohio). [PDF] |
| 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. |
Classical
