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Astronomy Chemical element

Aluminium

Aluminium (Al) is a post-transition metal with atomic number 13 and atomic mass 26.9815 u. This sheet describes its fundamental properties, periodic position and physical characteristics.

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Astronomy · Chemical element

Aluminium

ELD

Identity

  • Name: Aluminium
  • Symbol: Al
  • Atomic number: 13
  • Atomic mass: 26.9815 u

Position in the periodic table

  • Group: 13
  • Period: 3
  • Category: Post-transition metal

Physico-chemical properties

  • Standard state: Solid
  • Melting point: 660.3 °C
  • Density: 2.70 g/cm³
  • Electron configuration: [Ne] 3s² 3p¹

Scientific description

Aluminium is a p-block metal commonly classified as a post-transition metal. It occupies group 13 and period 3 of the periodic table and is characterized by low density and high corrosion resistance. Its standard atomic mass is 26.9815 u.