- Atomic Radius (Å)
Magnesium is a chemical element with symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (Group 2, or alkaline earth metals) of the periodic table:they each have the same electron configuration in their outer electron shell producing a similar crystal structure. Magnesium is the ninth most abundant element in the universe.
12
Atomic Number
24.3
Atomic Mass (u)
923.15
Melting Point (K)
1363
Boiling Point (K)
1.74
Density (solid: g/cm³, gas: g/liter)
1.7
Atomic Radius (Å)
1.41
Covalent Radius (Å)
1.31
Electronegativity
7.65
First Ionization Energy (eV)
-40
Electron Affinity
3
Number of Shells
2
Electron Valency
2, 8, 2
Electron Shell Occupations
1.02
Specific Heat (J/g)