Template:Infobox magnesium

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12 sodium ← magnesium → aluminium Be ↑ Mg ↓ Ca Periodic table - Extended periodic table
General
Name, symbol, number	magnesium, Mg, 12
Chemical series	alkaline earth metals
Group, period, block	2, 3, s
Appearance	silvery white solid at room temp
Standard atomic weight	24.3050(6) g·mol−1
Electron configuration	[Ne] 3s2
Electrons per shell	2, 8, 2
Physical properties
Phase	solid
Density (near r.t.)	1.738 g·cm−3
Liquid density at m.p.	1.584 g·cm−3
Melting point	923 K (650 °C, 1202 °F)
Boiling point	1363 K (1091 °C, 1994 °F)
Heat of fusion	8.48 kJ·mol−1
Heat of vaporization	128 kJ·mol−1
Specific heat capacity	(25 °C) 24.869 J·mol−1·K−1
Vapor pressure P/Pa 1 10 100 1 k 10 k 100 k at T/K 701 773 861 971 1132 1361
Atomic properties
Crystal structure	hexagonal
Oxidation states	2, 1 [1] (strongly basic oxide)
Electronegativity	1.31 (Pauling scale)
Ionization energies (more)	1st: 737.7 kJ·mol−1
	2nd: 1450.7 kJ·mol−1
	3rd: 7732.7 kJ·mol−1
Atomic radius	150 pm
Atomic radius (calc.)	145 pm
Covalent radius	130 pm
Van der Waals radius	173 pm
Miscellaneous
Magnetic ordering	paramagnetic
Electrical resistivity	(20 °C) 43.9 nΩ·m
Thermal conductivity	(300 K) 156 W·m−1·K−1
Thermal expansion	(25 °C) 24.8 µm·m−1·K−1
Speed of sound (thin rod)	(r.t.) (annealed) 4940 m·s−1
Young's modulus	45 GPa
Shear modulus	17 GPa
Bulk modulus	45 GPa
Poisson ratio	0.29
Mohs hardness	2.5
Brinell hardness	260 MPa
CAS registry number	7439-95-4
Selected isotopes
Main article: Isotopes of magnesium iso NA half-life DM DE (MeV) DP 24Mg 78.99% 24Mg is stable with 12 neutrons 25Mg 10% 25Mg is stable with 13 neutrons 26Mg 11.01% 26Mg is stable with 14 neutrons
References
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