Arsenic is located on the fourth period and the fifteenth group in the periodic table of elements. It is a gray solid with a sublimation point of 816.8 degrees Celsius at a pressure of 28 atmospheres. Arsenic is a member of the metalloids . It can form up to 3 bonds. Arsenic was identified around 1250 Albertus Magnus though many Arsenic compounds were known a long time before then.

Arsenic was famously used a a poison. However, it can also be used as an insecticide, to preserve wood, fireworks, and a semiconductor.