Silicon

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This editable Main Article is under development and subject to a disclaimer.

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| Silicon | 28.0855(3) |

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| Si

1s22s22p63s23p2 |
[ ? ] | Metalloid:

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Properties:
In crystalline form, grayish metallic luster. Relatively inert chemically.
Uses:
Concrete, glass, refractories, ceramics, semiconductors.

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] Silicon has a density of 2.33 g/cc.

## References[edit]

1. ↑ Abundances of the Elements in the Earth's Crust Physics and Astronomy Dept., Georgia State University