14
Si
Silicon
Silicon
Silicon (Si)
Metalloids · Solid · Period 3 · Group 14
Element Properties
- Atomic Number
- 14
- Symbol
- Si
- Atomic Mass
- 28.085
- Category
- Metalloids
- Standard State
- Solid
- Period
- 3
- Group
- 14
- Electronegativity
- 1.9
- Atomic Radius
- 210
- Ionization Energy
- 8.15
- Electron Affinity
- 1.39
- Oxidation States
- +4, +2, -4
- Melting Point
- 1687 K (1413.85 °C)
- Boiling Point
- 3538 K (3264.85 °C)
- Density
- 2.3296
- Electron Configuration
- [Ne]3s2 3p2
- Year Discovered
- 1854
Electron shells
[Ne]3s2 3p2
Electrons are arranged in shells (principal energy levels) around the nucleus. The diagram is a schematic — orbitals in the same shell are not drawn separately.
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Frequently asked questions
What is the atomic number of Silicon?
The atomic number of Silicon is 14, which equals the number of protons in its nucleus.
What is the atomic mass of Silicon?
The atomic mass of Silicon is approximately 28.085 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Silicon?
The electron configuration of Silicon is [Ne]3s2 3p2.
Where is Silicon in the periodic table?
Silicon is located in period 3, group 14.
When was Silicon discovered?
Silicon was discovered in 1854.