- WebElements: Barium
Contains key data, history, uses, compounds, electronic properties, and much more.
www.webelements.com/webelements/elements/text/Ba/key.html
- EnvironmentalChemistry.com: Barium
Offers overview, name in other languages, atomic structure, chemical properties, physical properties, and regulatory information.
environmentalchemistry.com/yogi/periodic/Ba.html
- Wikipedia: Barium
Hyperlinked overview of the element featuring notable characteristics, applications, history, occurrence, compounds, isotopes, and precautions.
en.wikipedia.org/wiki/Barium
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