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Astronomy Chemical element

Silicon

Silicon (Si) is a metalloid with atomic number 14 and atomic mass 28.0850 u. This sheet describes its fundamental properties, periodic position and physical characteristics.

Stays within its layer Astronomy

Neighbourhood in the graph

Above, what contains it; below, what it contains; on the right, what links it to another layer.

Astronomy · Chemical element

Silicon

ELE

Identity

  • Name: Silicon
  • Symbol: Si
  • Atomic number: 14
  • Atomic mass: 28.0850 u

Position in the periodic table

  • Group: 14
  • Period: 3
  • Block: p-block
  • Category: Metalloid

Physico-chemical properties

  • Standard state: Solid
  • Melting point: 1414°C (1687 K)
  • Boiling point: 3265°C (3538 K)
  • Density: 2.33 g/cm³
  • Electron configuration: [Ne] 3s² 3p²

Scientific description

Silicon is a chemical element belonging to the metalloids. It occupies group 14 and period 3 of the periodic table. Its standard atomic mass is 28.0850 u.