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Chemical element: Silicon (Si)
| Atomic Number: | 14 |
| Element Symbol: | Si |
| Element Name: | Silicon |
| Atomic Weight: | 28.0855 |
| Group Number: | 14 |
| Group Name: | none |
| Period Number: | 3 |
| Block: | p-block |
| Ground State Configuration: | [Ne] 3s2 3p2 |
| Ground State Level: | 3P0 |
| Standard State: | Solid |
| Common Valences: | 4 |
| Bond Length: | 235.2 |
| Atomic Radius Empirical: | 110 |
| Atomic Radius Calculated: | 111 |
| Covalent Radius Empirical: | 111 |
| Vander Waals Radius: | 210 |
| Electron Affinity: | 133.6 |
| First Ionization Energy: | 786.5 |
| Pauling Electronegativity: | 1.90 |
| Sanderson Electronegativity: | 2.14 |
| Allred Rochow Electronegativity: | 1.74 |
| Mulliken Jaffe Electronegativity: | 2.28 |
| Allen Electronegativity: | 1.916 |
| Density Of Solid: | 2330 |
| Molar Volume: | 12.06 |
| Velocity Of Sound: | 2200 |
| Youngs Modulus: | 47 |
| Bulk Modulus: | 100 |
| Mineral Hardness: | 6.5 |
| Electrical Resistivity: | about 100000 |
| Reflectivity: | 28 |
| Melting Point: | 1414 |
| Boiling Point: | 2900 |
| Thermal Conductivity: | 150 |
| Coefficient Of Linear Expansion: | 2.6 |
| Enthalpy Of Fusion: | 50.2 |
| Enthalpy Of Vaporization: | 359 |
| Enthalpy Of Atmization: | 456 |
| Most Common Oxidation Numbers: | 4,-4 |
| Color: | Dark grey with a bluish tinge |
| Classification: | Semi-metallic |
| Discovered By: | Jons Jacob Berzelius |
| Discovered At: | Sweden |
| Discovered When: | 1824 |
| Origin Of Name: | From the Latin word silicis meaning flint |
Calculate the molecular weight of Silicon or molecular weight Si.
Also see the full list of chemical elements and atomic weights.
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