By Anne Marie Helmenstine, Ph.D.
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.
Periodic Table of the ElementsElements in the Human BodyMost Abundant Element
Lab Safety SignsScience PicturesElement Photos Needed for the Gallery
Mentos & Soda FountainMake a Smoke BombLiquid Nitrogen Ice Cream
Anne Marie Helmenstine, Ph.D.
©2013 About.com. All rights reserved.