Definition: Arsenic is the name for the element with atomic number 33 and is represented by the symbol As.
It is a member of the metalloid group.
It is a member of the metalloid group.
By Anne Marie Helmenstine, Ph.D., About.com Guide
Natural arsenic with quartz and calcite, from Ste. Marie-aux-mines, Alsace, France. Specimen is at the Natural History Museum, London. Pure arsenic is found in many forms, or allotropes, including yellow, black, and gray.
Aram Dulyan