Arsenic


 * Element Name**: Arsenic


 * Element Symbol**: As


 * Atomic Mass**: 75[[image:arsenic_kayci.png width="216" height="288" align="right"]][[image:Arsenic1.gif width="288" height="216" align="right"]]


 * Atomic Number**: 33


 * Protons**: 33


 * Electrons**: 33


 * Discovery**: Arsenic was discovered by Albertus Magnus, a German alchemist, in 1250.


 * How It Was Named**: Arsenic was named from the Latin word arsenicum, the Greek word arsenikon, and the Arabic word Az-zernikh.


 * State of Matter**: Solid


 * Melting Point**: 817°C


 * Boiling Point**: 614°C


 * Characteristics**:
 * steel gray
 * very brittle
 * crystalline
 * semimetallic solid
 * arsenic and its compounds are poisonous
 * when heated it rapidly oxidizes to arsenic oxide, which smells like garlic


 * Uses of Elements**:
 * strengthening alloys of copper and lead (example: in automotive batteries)
 * used to make rat poison and some insecticides
 * added to germanium to make transistors and gallium arsenide together can produce laser light directly from electricity


 * Interesting Facts**:
 * Arsenic's melting point is lower then its boiling point because they are measured at two different atmospheric pressures
 * Albertus obtained it by heating soap together with orpiment (arsenic trisulphide)

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