arsenic
Instance URI: http://resource.geosciml.org/classifier/cgi/commodity-code/arsenic
Within scheme: South Australian Commodity Codes
Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. Arsenic is a metalloid. It can exist in various allotropes, although only the gray.form has important use in industry.