12 Mg Magnesium 24,305 u

Magnesium

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Période
3
Groupe
2
Bloc
s-bloc
Phase (STP)
Solid

Magnesium is a lightweight alkaline earth metal essential for living cells. It burns with a bright white flame and is used in alloys and fireworks.

Apparence: Shiny grey solid

Propriétés physiques

Masse atomique 24.305 u
Densité 1.738 g/cm³
Point de fusion 649.9 °C
Point d'ébullition 1089.8 °C
Phase à STP Solid
Rayon atomique 145.0 pm

Propriétés électroniques

Électronégativité 1.31
Énergie d'ionisation 737.7 eV
Électrons de valence 2

Configuration électronique

Configuration [Ne] 3s²

Electron Shell Configuration

Magnesium electron shell configuration Mg 2e⁻ 8e⁻ 2e⁻

Position in Periodic Table

Magnesium position in the periodic table Mg

Découverte

Découvert par: Joseph Black
Année: 1755

Compounds Containing Magnesium

Plus de Métal Alcalino-Terreux

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Frequently Asked Questions

What is Magnesium?
Magnesium (Mg) is a chemical element with atomic number 12. It is a solid at standard temperature and pressure, classified as a métal alcalino-terreux.
What are the key properties of Magnesium?
Magnesium has an atomic mass of 24.305 u, density of 1.738 g/cm³, melting point of 649.9°C, boiling point of 1089.8°C.
What is the electron configuration of Magnesium?
The electron configuration of Magnesium is [Ne] 3s2. It is in the s-block of the periodic table.
Who discovered Magnesium?
Magnesium was discovered by Joseph Black in 1755.
What is the electronegativity of Magnesium?
Magnesium has an electronegativity of 1.31 on the Pauling scale.