Silicon: Difference between revisions
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'''Silicon''' is a [[Chemical elements|chemical element]], having the [[chemical symbol]] Si. Its [[atomic number]] (the number of [[proton]]s) is 14. It has a [[Atomic mass#Standard atomic weights of the elements|standard atomic weight]] of 28.0855 g•mol<sup> −1</sup>, and is typically found as a [[solid]]. | '''Silicon''' is a [[Chemical elements|chemical element]], having the [[chemical symbol]] Si. Its [[atomic number]] (the number of [[proton]]s) is 14. It has a [[Atomic mass#Standard atomic weights of the elements|standard atomic weight]] of 28.0855 g•mol<sup> −1</sup>, and is typically found as a [[solid]] in its various forms as [[silicon dioxide]], [[silica]] and [[silicates]]. | ||
Silicon is considered a member of the "Metalloid" class of element. At a [[pressure]] of 101.325 k[[Pascal (unit)|Pa]], it has a [[boiling point]] 3,265 °[[Celsius (unit)|C]], and a [[melting point]] of 1,414 °C. | Silicon is considered a member of the "Metalloid" class of element. At a [[pressure]] of 101.325 k[[Pascal (unit)|Pa]], it has a [[boiling point]] 3,265 °[[Celsius (unit)|C]], and a [[melting point]] of 1,414 °C. In [[Earth]]'s crust, silicon is the second most abundant element after [[oxygen]], being about 28% of the crust by mass.<ref>[http://hyperphysics.phy-astr.gsu.edu/hbase/tables/elabund.html Abundances of the Elements in the Earth's Crust] Physics and Astronomy Dept., [[Georgia State University]]</ref> | ||
==References== | |||
{{Reflist}} | |||
Revision as of 23:26, 17 April 2011
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Silicon is a chemical element, having the chemical symbol Si. Its atomic number (the number of protons) is 14. It has a standard atomic weight of 28.0855 g•mol −1, and is typically found as a solid in its various forms as silicon dioxide, silica and silicates.
Silicon is considered a member of the "Metalloid" class of element. At a pressure of 101.325 kPa, it has a boiling point 3,265 °C, and a melting point of 1,414 °C. In Earth's crust, silicon is the second most abundant element after oxygen, being about 28% of the crust by mass.[1]
References
- ↑ Abundances of the Elements in the Earth's Crust Physics and Astronomy Dept., Georgia State University