Silicon |
| Symbol | Si |
|---|---|
| Latin name | Silicium |
| Atomic number | 14 |
| Period | 3 |
| Element category | Metalloids |
| Relative atomic mass | 28.0855 |
| Group | IV.A |
| Electronegativity | 1.8 |
| Oxidation numbers | -4, 4 |
| Electron configuration | 1s2 2s2 2p6 3s2 3p2 |
| Density [g/cm3] | 2.332 |
| State | Solid |
| Melting point [°C] | 1410 |
| Boiling point [°C] | 2355 |
| Atomic radius [pm] | 111 |
| Covalent radius [pm] | 111 |
| Thermal conductivity [W m-1K-1] | 148 |
| Heat capacity [J K-1g-1] | 0.70 |
| Discovery | 1824 |
| Hardness [Mohs scale] | 7.0 |
| Young's modulus [GPa] | 47 |
| Electrical conductivity [S m-1] | 4 · 102 |
| 1.st ionization energy [eV] | 8.1517 |
| 2.nd ionization energy [eV] | 16.345 |
| 3.rd ionization energy [eV] | 33.492 |
| Stable isotopes | 3 |
| Unstable isotopes | 5 |