- ChemGlobe: Berkelium
- Electronic and thermal data along with an isotope table.
- ChemicalElements.com: Berkelium
- Basic information, atomic structure, and isotopes.
- EnvironmentalChemistry.com: Berkelium
- Atomic structure, chemical and physical properties, and table of nuclides.
- It's Elemental: Berkelium
- Basic physical and historical information.
- LANL: Berkelium
- Basic information and history.
- Lenntech: Berkelium
- Physical data, chemical properties, and health effects.
- Visual Elements: Berkelium
- General and physical information, and key isotopes.
- WebElements: Berkelium
- Extensive information on history, compounds, and properties.
- Wilipedia: Berkelium
- Overview of this element, its properties, history and applications.
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