Arsenic - Element Properties and Periodic Table Information

Arsenic - An element from the Periodic Table based on the IOUPAC 1985 standard

Chemical Elements

Periodic Table

Definition of the Arsenic Element
A highly poisonous metallic element having three allotropic forms, yellow, black, and gray, of which the brittle, crystalline gray is the most common. Arsenic and its compounds are used in insecticides, weed killers, solid-state doping agents, and various alloys.

Origin / Meaning of the name Arsenic
The name originates from Greek word arsenikos.

Classification of the Arsenic Element
Arsenic is classified as a "Metalloid" element and is located in Groups 13, 14,15, 16 and 17 of the Periodic Table. An element classified as a Metalloid has properties of both metals and non-metals. Some are semi-conductors and can carry an electrical charge making them useful in calculators and computers.

The Discovery of Arsenic
Arsenic was isolated by Albertus Magnus.

Facts about the History of the Arsenic Element
Was discovered in Ancient times and used by the ancient Asians, Egyptians, Greeks, Romans and Chinese.

Occurrence the Arsenic Element
Arsenopyrite also called mispickel

Associated Uses of Arsenic
Insecticides
Poison
Weed killers
Various alloys
Medical Treatments
Semi-conductors

The Properties of the Arsenic Element
Name of Element : Arsenic
Symbol of Element : As
Atomic Number of Arsenic : 33
Atomic Mass: 74.9216 amu
Melting Point:  817.0 °C - 1090.15 °K
Boiling Point: 613.0 °C - 886.15 °K
Number of Protons/Electrons in Arsenic : 33
Number of Neutrons in Arsenic : 42
Crystal Structure: Rhombohedral
Density @ 293 K: 5.72 g/cm3
Color of Arsenic : yellow, black, and gray

Arsenic and the Periodic Table
Check out Arsenic on the Periodic Table which arranges each chemical element according to its atomic number, as based on the periodic law, so that chemical elements with similar properties are in the same column. Our Periodic Table is simple to use - just click on the symbol for Arsenic for additional information and for an instant comparison of the Atomic Weight, Melting Point, Boiling Point and Mass - G/cc with any other element. An invaluable source of facts and information as a Chemistry reference guide.

Arsenic - IUPAC and the Modern Standardised Periodic Table
The Standardised Periodic Table in use today was agreed by the International Union of Pure Applied Chemistry, IUPAC, in 1985 and now recognises more periods and elements than Dimitri  Mendeleev knew in his day but still all fitting into his concept of  the "Periodic Table" in which Arsenic is just one element that can be found.
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The Element Arsenic

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