14 Si 28.085
Silicon
metalloid
Properties
- Atomic number
- 14
- Atomic mass
- 28.085 u
- Category
- metalloid
- Group
- 14
- Period
- 3
- Block
- p-block
- State (room temp)
- Solid
- Outer-shell electrons
- 4
- Electronegativity
- 1.9 (Pauling)
- Density
- 2.329 g/cm³
- Melting point
- 1413.85 °C
- Boiling point
- 3264.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p²
Noble-gas shorthand: [Ne] 3s² 3p²
Electrons per shell: 2, 8, 4 — that's 4 in the outermost shell.
About Silicon
Silicon is a chemical element with symbol Si and atomic number 14. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table. Controversy about silicon's character dates to its discovery.
- Discovered by Jöns Jacob Berzelius
- Named by Thomas Thomson (chemist)
- Appearance: crystalline, reflective with bluish-tinged faces
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.