See also:

• Science: Chemistry: Elements: Metalloids  (0)
• Science: Environment: Environmental Health: Toxic Substances: Arsenic  (6)
• Science: Environment: Water Resources: Groundwater: Arsenic Contamination  (12)

ChemGlobe: Arsenic - Electronic, thermal, and steric data along with an isotope table..

ChemicalElements.com: Arsenic - Basic information, atomic structure, and isotopes..

EnvironmentalChemistry.com: Arsenic - Atomic structure, chemical and physical properties, and table of nuclides..

It's Elemental: Arsenic - Basic physical and historical information..

LANL: Arsenic - History, properties, and uses..

Lenntech: Arsenic - Physical data, chemical properties, health and environmental effects..

Periodic Table of the Elements: Arsenic - Thermal properties, ionisation energies, and reduction potentials..

Radiochemistry of Arsenic - Full text of the monograph by J. G. Cuninghame (Atomic Energy Research Establishment, Harwell, Didcot, Berkshire, England). [PDF].

USGS - Minerals Information: Arsenic - Overview and a number of publications in PDF format..

Visual Elements: Arsenic - Source, biological role, physical information, and key isotopes..

WebElements: Arsenic - Extensive information on history, uses, occurrence, compounds, and properties of the element..

Wikipedia: Arsenic - Details the properties of the element, including its history, applications, and characteristics..