- The Columbia Encyclopedia: Berkelium - http://www.bartleby.com/65/be/berkeliu.html
- Overview for the general reader.
- It's Elemental: Berkelium - http://education.jlab.org/itselemental/ele097.html
- Basic physical and historical information.
- ChemicalElements.com: Berkelium - http://www.chemicalelements.com/elements/bk.html
- Basic information, atomic structure, and isotopes.
- Visual Elements: Berkelium - http://www.chemsoc.org/viselements/pages/berkelium.html
- General and physical information, and key isotopes.
- EnvironmentalChemistry.com: Berkelium - http://environmentalchemistry.com/yogi/periodic/bk.html
- Atomic structure, chemical and physical properties, and table of nuclides.
- Lenntech: Berkelium - http://www.lenntech.com/periodic-chart-elements/bk-en.htm
- Physical data, chemical properties, and health effects.
- LANL: Berkelium - http://periodic.lanl.gov/elements/97.html
- Basic information and history.
- ChemGlobe: Berkelium - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/97.html
- Electronic and thermal data along with an isotope table.
- WebElements: Berkelium - http://www.webelements.com/webelements/elements/text/bk/key.html
- Extensive information on history, compounds, and properties.
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