Florida-Spectrum Environmental Services
Florida Spectrum: Chemical Fact Sheet: Arsenic
Good site for basic data and uses of arsenic with an especially thorough summary of environmentally relevant information.
Environmental Chemistry
Environmental chemistry.com: Periodic Table Arsenic
This is as thorough as site as you will find for information of all kinds on arsenic. Very helpful.
Encyclopedia of Earth
Encyclopedia of Earth: Arsenic
Basic information about the element Arsenic, atomic number 33. Covers physical properties and properties, sources, how abundant it is on the Earth, uses, and toxicity.
Other
Web ref.org: Arsenic
Some basic information along with good information on uses and health related facts on arsenic.
Web Elements
Web Elements Periodic Table: Arsenic
WebElements offers a very thorough listing of information arsenic, its uses and properties as well as basic data. very helpful.
US Geological Survey
Usgs: Arsenic in Ground Water in the United States
This page discusses the presence of arsenic (chemical symbol As) in ground water in the United States. Also provides many links to other sites about arsenic (especially in drinking water.)
University of Kentucky
Chem Comics: Arsenic
Comics from the 1960's featuring the element arsenic. Not the greatest source of information, but interesting with some very nice visuals.
TED Talks
Ted: Ted Ed: Arsenic: Periodic Table of Videos
The team at Periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about arsenic- element number 33 and is famous for the toxicity of its compounds. [2:28]
Other
Bangladesh Information Centre: The Arsenic Crisis
This is a report on the crisis in West Bengal and Bangladesh over the drinking of well water naturally containing high concentrations of arsenic.
Khan Academy
Khan Academy: Thermodynamics of Gallium Arsenide Formation
Read the passage "Thermodynamics of Gallium Arsenide Formation," and complete the related five-question quiz.
Royal Society of Chemistry
Chemical Society: Arsenic
Resource gives descriptive and historical information on arsenic.
Ducksters
Ducksters: Chemistry for Kids: Elements: Arsenic
Study arsenic and its chemistry including atomic weight, atom, uses, sources, name, and discovery on this site. Also discussed are arsenic's properties and characteristics.