Silicon (Si)
Silicium
Silicon (Si) is a metalloid in period 3, group 14. Its relative atomic mass is 28.085 and the molar mass of the atom is 28.085 g/mol.
Atomic number 14
Atomic mass 28.085
Molar mass 28.085 g/mol
Category Metalloid Solid
Properties of silicon
| Atomic number | 14 |
|---|---|
| Symbol | Si |
| Latin name | Silicium |
| Relative atomic mass | 28.085 |
| Molar mass | 28.085 g/mol |
| Group, period, block | 14, 3, p |
| Category | Metalloid |
| State at 20 °C | Solid |
| Electron configuration | [Ne] 3s² 3p² |
| Electronegativity (Pauling) | 1.9 |
| Atomic radius | 110 pm |
Electron configuration of silicon
Electrons per shell
K2L8M4
Full notation
1s² 2s² 2p⁶ 3s² 3p²
Noble-gas notation
14 protons · 14 electrons[Ne] 3s² 3p²
Formula and compounds of silicon
Simple substanceSisiliconMolar mass of Si: 28.085 g/mol
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Frequently asked questions
The relative atomic mass of silicon is 28.085, so the molar mass of the atom is 28.085 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p². Noble-gas notation: [Ne] 3s² 3p².