As meaning in Chemistry ?

Answer: What is Arsenic mean?

Arsenic is a chemical element with the symbol As and atomic number 33. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Arsenic is a metalloid. It has various allotropes, but only the gray form, which has a metallic appearance, is important to industry.

The primary use of arsenic is in alloys of lead (for example, in car batteries and ammunition). Arsenic is a common n-type dopant in semiconductor electronic devices. It is also a component of the III-V compound semiconductor gallium arsenide. Arsenic and its compounds, especially the trioxide, are used in the production of pesticides, treated wood products, herbicides, and insecticides. These applications are declining with the increasing recognition of the toxicity of arsenic and its compounds.

A few species of bacteria are able to use arsenic compounds as respiratory metabolites. Trace quantities of arsenic are an essential dietary element in rats, hamsters, goats, chickens, and presumably other species. A role in human metabolism is not known. However, arsenic poisoning occurs in multicellular life if quantities are larger than needed. Arsenic contamination of groundwater is a problem that affects millions of people across the world.

The United States' Environmental Protection Agency states that all forms of arsenic are a serious risk to human health. The United States' Agency for Toxic Substances and Disease Registry ranked arsenic as number 1 in its 2001 Priority List of Hazardous Substances at Superfund sites. Arsenic is classified as a Group-A carcinogen.

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Chinese Academy (Taiwan)	Academic & Science
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Australian Standard	Academic & Science
Académie des Sciences	Academic & Science
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Associated Students	Academic & Science
Analytical Studies	Academic & Science
Accounting Standard	Banking
Allocation Status	Business
American Standard Code for Safety Glazing Materials	Business
Arsenic	Chemistry
Ammonium Sulphate	Chemistry
Asif Sakhi	Community
Airline Schedule	Community
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Accommodation Support	Community
Alexander Schleicher	Community
Adolf Schickelgruber	Community
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Antonio Stradivari, violin maker	Community
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American Singer	Community
Add Sideways	Computer Assembly Language
Accelerated Standard	Computer Hardware
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American Samoa (TLD)	Computing
ASsembler	Computing
Activity Start	Computing
Application System	Computing
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Auto and Shop Information	Governmental
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Apprentice Seaman	Governmental
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Alaska Statute	Governmental
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Astigmatism	Medical
Asperger Syndrome	Medical
left ear [Lat.]	Medical
Absence of Seizures	Medical
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Acoustic Schwannoma	Medical
Acoustic Stimulation	Medical
Active Surveillance	Medical
Anabolic Steroid	Medical
Ankylosing Spondylitis	Medical
Acute Stress	Medical
Adams-Stokes syndrome	Medical
Adeno-Squamous carcinoma	Medical
Adult Services	Medical
Allele-Specific oligonucleotide	Medical
Alport Syndrome	Medical
Ambulatory Surgery	Medical
Androgen Suppression	Medical
AngioSarcoma	Medical
Anionic Surfactant	Medical
Anovulatory Syndrome	Medical
Anterior Scalene	Medical
anteroseptal	Medical
antisense	Medical
antiserum	Medical
Ascaris suum	Medical
Asparagine Synthetase	Medical
Assisted Suicide	Medical
Aviation Ship	Military and Defence
Air Force Standard	Military and Defence
Access System	Military and Defence
Acquisition Strategy	Military and Defence
All Source	Military and Defence
Authorization Subsystem	Military and Defence
Aerial Surveillance	Military and Defence
Assault Support	Military and Defence
As Stated	Military and Defence
Faadc2i Simplified Handheld Terminal Unit	Military and Defence
Anti-submarine	Military and Defence
Assault Shotgun	Military and Defence
Analog Secure	Military and Defence
Appliance Server	Networking
Application Server	Networking
Add Subnet	Networking
Australian Standards	Regional
Australian Or Samo	Regional
Assamese	Regional
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