| Si | Silicon | Non-Metal |
| Atomic number: | 14 | Atomic weight: | 28.0855 | ||
| Shells: | 2,8,4 | Orbitals: | [Ne] 3s2 3p2 | ||
| Melting point: | 1410°C | Boiling point: | 3265°C | ||
| Covalent radius: | 1.11 | Å | Atomic volume: | 12.1 | cm³/mol |
| Atomic radius: | 1.46 | Å | Ionic radius: | .26 (+4) | Å |
| Electronegativity: | 1.80 | Oxidation states: | 2,(4),-4 | ||
| 1st ionization pot.: | 8.1517 | V | 2nd ionization pot.: | 16.345 | V |
| 3rd ionization pot.: | 33.492 | V | Specific heat: | 0.71 | J/gK |
| Heat of fusion: | 50.550 | kJ/mol | Heat of vapor.: | 384.220 | kJ/mol |
| Thermal conduct.: | 1.48 | W/cmK | Electrical conduct.: | 2.52e-12 | 10^6/cm ohm |
| Density: | 2.33 | g/cm³ | Valence: | 4 |