33

AsArsenic

74.92160

P=33N=33

Properties and uses of ArsenicProperties and uses of Arsenic

Properties of ArsenicProperties of Arsenic• Upon heating arsenic and someUpon heating arsenic and someminerals containing arsenic, it sublimes. minerals containing arsenic, it sublimes. • Elemental arsenic occurs in two solid Elemental arsenic occurs in two solid

modifications: yellow, and grey or modifications: yellow, and grey or metallic.metallic.

• With specific gravities of 1.97, and With specific gravities of 1.97, and 5.73.5.73.

• Arsenic has a atomic weight ofArsenic has a atomic weight of 74.92160.74.92160.• Arsenic’s atomic number is 33.Arsenic’s atomic number is 33.• Arsenic’s group is semi-metallic.Arsenic’s group is semi-metallic.• Gray arsenic is a very brittle semi-Gray arsenic is a very brittle semi-

metallic solid. metallic solid.

Uses of ArsenicUses of Arsenic• Arsenic is used as a doping agent Arsenic is used as a doping agent

in solid-state devices.in solid-state devices.• Arsenic compounds are used as Arsenic compounds are used as

insecticides and in other poisons.insecticides and in other poisons.

• Gallium arsenide is used in lasers Gallium arsenide is used in lasers which convert electricity into which convert electricity into coherent lightcoherent light. .

• Arsenic is used pyrotechny, Arsenic is used pyrotechny, hardening and improving the hardening and improving the sphericity of shot, and in bronzingsphericity of shot, and in bronzing

• Arsenic is in alloys used for Arsenic is in alloys used for making boiler tubes.making boiler tubes.

• Arsenic is in insecticides and Arsenic is in insecticides and weed-killers.weed-killers.

• in the electronics industry in the in the electronics industry in the manufacture of semiconductors manufacture of semiconductors

Facts about ArsenicFacts about Arsenic

• Albertus Magnus discovered Albertus Magnus discovered Arsenic in 1250. Arsenic in 1250.

• Schroeder published two methods Schroeder published two methods of preparing elemental arsenic in of preparing elemental arsenic in

1649.1649. • The origin of the name comes The origin of the name comes

from the Greek work arsenikon from the Greek work arsenikon meaning yellow orpiment.meaning yellow orpiment.

• It is about the 52It is about the 52ndnd most common most common chemical element on the earth.chemical element on the earth.

• Arsenic is thought to be the most Arsenic is thought to be the most toxic, while most organic forms of toxic, while most organic forms of arsenic are relatively less toxic.arsenic are relatively less toxic.

• Arsenic is a naturally occurring Arsenic is a naturally occurring substance.substance. Arsenic was widely used by early alchemists

and was also sometimes represented by the

image of a swan.

Arsenic

Uses

Arsenic is used in Weed killers

Properties

Arsenic is poisonous

Yellow, and grey are Arsenic’s colors

Arsenic is also in lasers

History

Albertus Magnus founded Arsenic

Info

Arsenic is naturally

occurring substance

Arsenic is in alloys used for making

boiler tubes

ResourcesResources

• http://www.google.comhttp://www.google.com

• http://www.chemicool.comhttp://www.chemicool.com