Arsenic

From Citizendium, the Citizens' Compendium
Jump to: navigation, search
This article is a stub and thus not approved.
Main Article
Talk
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
Properties [?]
 
This editable Main Article is under development and not meant to be cited; by editing it you can help to improve it towards a future approved, citable version. These unapproved articles are subject to a disclaimer.
Arsenic
74.92160(2)



  As
33
1s22s22p63s23p63d104s2 4p3
[ ? ] Metalloid:
Properties:
Steel-gray, brittle metal
Hazard:
Poisonous


Arsenic is a chemical element, having the chemical symbol As. Its atomic number (the number of protons) is 33. It has a standard atomic weight of 74.9216 g•mol −1 and is a solid in its elemental form.

Arsenic is considered to be a member of the "Metalloid" class of element. At a pressure of 1 atm (101.325 kPa), it has a sublimation point of 613 °C and, at a pressure of 28 atm, it has a melting point of 817 °C.[1]

References

  1. Note: If the boiling point was also measured at a pressure of 28 atm, it would be higher than the melting point.