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Astronomy Chemical element

Magnesium

Magnesium (Mg) is a chemical element belonging to the category Alkaline earth metal, with atomic number 12 and standard atomic mass 24.305 u. This sheet describes its fundamental properties, periodic position and physical characteristics.

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Astronomy · Chemical element

Magnesium

ELC

Identity

  • Name: Magnesium
  • Symbol: Mg
  • Atomic number: 12
  • Atomic mass: 24.305 u

Position in the periodic table

  • Group: 2
  • Period: 3
  • Category: Alkaline earth metal

Physico-chemical properties

  • Standard state: Solid
  • Melting point: 650°C
  • Boiling point: 1090°C
  • Density: 1.74 g/cm³ (at 20°C)
  • Electron configuration: [Ne] 3s²

Scientific description

Magnesium is a chemical element with symbol Mg and atomic number 12. It belongs to the category of Alkaline earth metal and occupies group 2 and period 3 in the periodic table. Its standard atomic mass is 24.305 u. It is a lightweight, silvery metal with relatively low density and a melting point of about 650°C.