Arsenic: Difference between revisions
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'''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 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> | 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== | ==References== | ||
{{reflist}} | {{reflist}} | ||
Revision as of 21:15, 24 April 2011
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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
- ↑ Note: If the boiling point was also measured at a pressure of 28 atm, it would be higher than the melting point.