Abstract:
<p align="justify"> Arsenic is an element known since ancient times. It is the 52nd element in order of chemical abundance in the Earth s crust with 1.8 ppm (grams per metric ton). Arsenic combines relatively easy with chlorine sulfur, oxygen, and many metals. This article describes some of the uses and properties of arsenic and arsenic compounds and presents a synopsis of the two hundred and seventy-eight (278) arsenate minerals known at the present time. </p>