12 Mg Magnesium 24.305 u

Magnesium

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Period
3
Group
2
Block
s-block
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.

Appearance: Shiny grey solid

Physical Properties

Atomic Mass 24.305 u
Density 1.738 g/cm³
Melting Point 649.9 °C
Boiling Point 1089.8 °C
Phase at STP Solid
Atomic Radius 145.0 pm

Electronic Properties

Electronegativity 1.31
Ionization Energy 737.7 eV
Valence Electrons 2

Electron Configuration

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

Discovery

Discovered by: Joseph Black
Year: 1755

Compounds Containing Magnesium

More Alkaline Earth Metal

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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 alkaline earth metal.
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.