Silicon (Si)
Element 14 Ā· Metalloid
Silicon (Si) is a chemical element with atomic number 14. It is classified as a metalloid in period 3, group 14 of the periodic table (the p-block). Its standard atomic weight is 28.085 u and its ground-state electron configuration is [Ne] 3sĀ² 3pĀ².
Silicon facts
| Atomic number (Z) | 14 |
|---|---|
| Symbol | Si |
| Standard atomic weight | 28.085 u |
| Category | Metalloid |
| Group | 14 |
| Period | 3 |
| Block | p-block |
| Electron configuration | [Ne] 3sĀ² 3pĀ² |
| Electronegativity (Pauling) | 1.9 |
| State at 20 Ā°C | Solid |
| Protons / electrons | 14 / 14 |
| Neutrons (most common isotope, approx.) | 14 |
| Molar mass | 28.085 g/mol |