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Silicon (Si) – Element 14 of the periodic table

Silicon (symbol Si) is element number 14 of the periodic table and belongs to the “Metalloid” category. Its atomic mass is about 28.085, and its phase under standard conditions is Solid. This element sits in period 3 and group 14 of the periodic table, and its electrons are arranged in shells of 2, 8, 4. The short electron configuration of Silicon is [Ne] 3s² 3p². Known uses of Silicon include Computer chips, Glass and Cement.

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Properties of Silicon

Atomic number
14
Chemical symbol
Si
Atomic mass
28.085
Category
Metalloid
Period
3
Group
14
Phase
Solid
Protons
14
Electrons
14
Neutrons (approx.)
14
Electron shells
2, 8, 4
Outer-shell electrons
4
Discovered
Jöns Jacob Berzelius (1824)

Electron configuration of Silicon

The electron configuration of Silicon (Si), with 14 electrons, is shown below. The last shell (shell 3) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p²
Short configuration
[Ne] 3s² 3p²
Last shell
3s² 3p²

What is electron configuration and how is it written?

Electron shells of Silicon

Distribution of 14 electrons of Silicon across shells K to M:

  1. K2
  2. L8
  3. M4

What is a metalloid?

The metalloids have properties between metals and nonmetals, and many of them are semiconductors.

Uses of Silicon

Frequently asked questions about Silicon

What is the atomic number of Silicon?

The atomic number of Silicon (Si) is 14; that is, every atom of it has 14 protons.

What is the electron configuration of Silicon?

The electron configuration of Silicon (Si) is 1s² 2s² 2p⁶ 3s² 3p²; in short form it is [Ne] 3s² 3p², and its last shell is 3s² 3p².

What is the chemical symbol of Silicon?

The chemical symbol of Silicon is Si.

Where is Silicon located in the periodic table?

Silicon is located in period 3 and group 14 and belongs to the “Metalloid” category.

What is the atomic mass of Silicon?

The atomic mass of Silicon is about 28.085 (atomic mass units).

What is the phase of Silicon under normal conditions?

The phase of Silicon under standard conditions is Solid.

What are the uses of Silicon?

Uses of Silicon include Computer chips, Glass and Cement.

Who discovered Silicon?

Silicon was discovered by Jöns Jacob Berzelius in 1824.

Elements in the same category as Silicon (Metalloid)

Boron (B)Germanium (Ge)Arsenic (As)Antimony (Sb)Tellurium (Te)

See all Metalloids

Silicon’s group 14 neighbours

Carbon (C)Germanium (Ge)Tin (Sn)Lead (Pb)Flerovium (Fl)

Group 14 of the periodic table