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, which is 4 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
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
Silicon: frequently asked questions
- What is Silicon?
- Silicon (Si) is the chemical element with atomic number 14. It is a metalloid, with properties between metals and nonmetals.
- What is the atomic number of Silicon?
- Silicon's atomic number is 14, which means every Silicon atom has 14 protons in its nucleus.
- What is the electron configuration of Silicon?
- The electron configuration of Silicon is 1s2 2s2 2p6 3s2 3p2 (noble-gas shorthand: [Ne] 3s2 3p2). Its electrons are arranged in shells of 2, 8, 4, with 4 in the outermost shell.
- Is Silicon a metal or a nonmetal?
- Silicon is a metalloid, with properties between metals and nonmetals.
- What group and period is Silicon in?
- Silicon is in group 14 and period 3 of the periodic table.
- Is Silicon a solid, liquid, or gas?
- At room temperature, Silicon is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.