12 Mg 24.305

Magnesium

ALKALINE EARTH METAL

Phase: Solid

Discovered: Joseph Black

Block: S

Summary

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.

Appearance: shiny grey solid

Source: Wikipedia

Physical Properties

Atomic Mass 24.305 u

Density 1.738 g/cm³

Melting Point 923 K

Boiling Point 1363 K

Molar Heat 24.869 J/(mol·K)

Electron Affinity -40 kJ/mol

Ionization Energies

1^st: 737.7 kJ/mol

2^nd: 1450.7 kJ/mol

3^rd: 7732.7 kJ/mol

4^th: 10542.5 kJ/mol

5^th: 13630 kJ/mol

6^th: 18020 kJ/mol

7^th: 21711 kJ/mol

8^th: 25661 kJ/mol

9^th: 31653 kJ/mol

10^th: 35458 kJ/mol

11^th: 169988 kJ/mol

12^th: 189368 kJ/mol