ChemGlobe: Berkelium
- Electronic and thermal data along with an isotope table.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/97.html
LANL: Berkelium
- Basic information and history.
- http://periodic.lanl.gov/elements/97.html
Lenntech: Berkelium
- Physical data, chemical properties, and health effects.
- http://www.lenntech.com/Periodic-chart-elements/Bk-en.htm
EnvironmentalChemistry.com: Berkelium
- Atomic structure, chemical and physical properties, and table of nuclides.
- http://environmentalchemistry.com/yogi/periodic/Bk.html
Visual Elements: Berkelium
- General and physical information, and key isotopes.
- http://www.chemsoc.org/viselements/pages/berkelium.html