- Wikipedia: Arsenic
Hyperlinked article about the element including notable characteristics, applications, history, occurrence, precautions, and more.
en.wikipedia.org/wiki/Arsenic
- EnvironmentalChemistry.com: Arsenic
Features an overview, name in other languages, atomic structure, physical properties, chemical properties, history, and regulatory information.
environmentalchemistry.com/yogi/periodic/As.html
- Chemical Elements.com: Arsenic
Contains basic stats, atomic structure, and isotopes.
www.chemicalelements.com/elements/as.html
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