Magnesium (Mg) properties

Atomic mass, symbol and atomic number

magnesium is a naturally occurring element with the elemental symbol Mg and the atomic number 12. In the periodic table it stands with an atomic mass of 24,305 u in the 2nd main group. The chemical element discovered by Joseph Black in 1755 is not radioactive and is in a solid state at room temperature.

Profile: Magnesium (English: Magnesium)

Chemical element:magnesium
Atomic number:12
Group:alkaline earth metal
Block:s block
Series:alkaline earth metals
explorers:Joseph Black
Year of discovery:1755
Atomic properties
Atomic mass:24,305 u
Atomic radius:150 pm
Covalent radius:141 pm
Van der Waals radius:173 pm
Electron configuration:Ne 3s2
ionization:737.7 kJ / mol
Physical Properties
Physical state:firmly
Density:1.738 g / cm3
Crystal structure:hexagonal
molar volume:14,00 · 10-6 m3/ mol
Mohs hardness:2,5
Melting point:650 ° C
Boiling point:1110 ° C
Heat of fusion:8.7 kJ / mol
Heat of vaporization:132 kJ / mol
Thermal conductivity:160 W
Chemical properties

Did you know that ...

  • Oatmeal, millet and sunflower seeds are particularly rich in magnesium?
  • China is the largest producer of magnesium?
  • pure magnesium is very flammable?
  • Magnesium flames should not be extinguished with water because of the danger of explosion?
  • the word magnesium presumably derives from the region Magnisia in Greece?