| Arsenic: Data tables and historic information. |
| 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. |
Classical
