Template:Infobox aluminium

magnesium ← aluminium → silicon B ↑ Al ↓ Ga 13Al Periodic table
Appearance
silvery gray metallic Spectral lines of aluminium
General properties
Name, symbol, number	aluminium, Al, 13
Pronunciation	UK i/ˌæljʉˈmɪniəm/ AL-ew-MIN-ee-əm; or US i/əˈluːmɨnəm/ ə-LOO-mi-nəm
Element category	other metal
Group, period, block	13, 3, p
Standard atomic weight	26.9815386(13)
Electron configuration	[Ne] 3s2 3p1
Electrons per shell	2, 8, 3 (Image)
Physical properties
Phase	solid
Density (near r.t.)	2.70 g·cm−3
Liquid density at m.p.	2.375 g·cm−3
Melting point	933.47 K, 660.32 °C, 1220.58 °F
Boiling point	2792 K, 2519 °C, 4566 °F
Heat of fusion	10.71 kJ·mol−1
Heat of vaporization	294.0 kJ·mol−1
Molar heat capacity	24.200 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1482 1632 1817 2054 2364 2790
Atomic properties
Oxidation states	3, 2, 1 (amphoteric oxide)
Electronegativity	1.61 (Pauling scale)
Ionization energies (more)	1st: 577.5 kJ·mol−1
	2nd: 1816.7 kJ·mol−1
	3rd: 2744.8 kJ·mol−1
Atomic radius	143 pm
Covalent radius	121±4 pm
Van der Waals radius	184 pm
Miscellanea
Crystal structure	face-centered cubic
Magnetic ordering	paramagnetic
Electrical resistivity	(20 °C) 28.2 nΩ·m
Thermal conductivity	237 W·m−1·K−1
Thermal expansion	(25 °C) 23.1 µm·m−1·K−1
Speed of sound (thin rod)	(r.t.) (rolled) 5,000 m·s−1
Young's modulus	70 GPa
Shear modulus	26 GPa
Bulk modulus	76 GPa
Poisson ratio	0.35
Mohs hardness	2.75
Vickers hardness	167 MPa
Brinell hardness	245 MPa
CAS registry number	7429-90-5
Most stable isotopes
Main article: Isotopes of aluminium
iso NA half-life DM DE (MeV) DP 26Al trace 7.17×105y β+ 1.17 26Mg ε - 26Mg γ 1.8086 - 27Al 100% 27Al is stable with 14 neutrons

References

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