Arsenic: Difference between revisions

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{{subpages}}
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{{Basic elemental info}}
 
{{Elem_Infobox
|elName= Arsenic
|eltrnCfg=1s<sup>2</sup>2s<sup>2</sup>2p<sup>6</sup>3s<sup>2</sup>3p<sup>6</sup>3d<sup>10</sup>4s<sup>2</sup>
4p<sup>3</sup>
|no1=
|no2=
|no3=
|no4=
|properties=Steel-gray, brittle metal
|compounds=
|uses=
|hazard=Poisonous
}}
 
'''Arsenic''' is a [[Chemical elements|chemical element]], having the [[chemical symbol]] As. Its [[atomic number]] (the number of [[proton]]s) is 33. It has a [[Atomic mass#Standard atomic weights of the elements|standard atomic weight]] of 74.9216 g•mol<sup> −1</sup> 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 [[Atmosphere  (unit)|atm]] (101.325 k[[Pascal (unit)|Pa]]), it has a [[sublimation point]] of 613 °[[Celsius (unit)|C]] and, at a pressure of 28 atm, it has a [[melting point]] of 817 °C.<ref>'''Note:''' If the boiling point was also measured at a pressure of 28 atm, it would be higher than the melting point.</ref>
 
==References==
{{reflist}}

Revision as of 21:15, 24 April 2011

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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.