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Aluminium

Metalsolid
Symbol: Al
Atomic number: 13
Atomic mass: 26.981539
Group: Metal
CAS-number: 7429-90-5

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Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 3
Orbitals: [Ne] 3s2 3p1
Electronegativity: 1.5, 1.5
1. Ionization potential: 5.9858 eV
2. Ionization potential: 18.828 eV
3. Ionization potential: 28.447 eV
Oxidation states: 3
Electrical conductivity: 0.377 10^6
Melting point: 660.37 °C
Boiling point: 2519 °C
Specific heat: 0.90 J/gK
Heat of fusion: 10.790 kJ/mol
Heat of vaporization: 293.40 kJ/mol
Thermal conductivity: 2.37 W/cmK
Atomic radius: 1.82 Å
Ionic radius: 0.54 Å (+3)
Covalent radius: 1.18 Å
Atomic volume: 10.0 cm³/mol
Density (293 K): 2.702 g/cm³
Crystal structure: cubic face centered
cubic face centered

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
26Al 0 25.9868 5 7.3E05y β+, EC View
27Al 100 26.9815 5/2 -- --
28Al 0 28 3 2.25m β- View

Other info

Name origin:Latin: alumen, aluminis, (alum)
Description:Soft, lightweight, silvery-white metal. Third most abundant element in the earth's crust.
Discovered by:Hans Christian Oersted
Year:1825
Place:Denmark
Sources:Never occurs in free form. Obtained by electrolysis from bauxite (Al2O3).
Use(s):Used for many purposes ranging from airplanes to beverage cans. Because it is too soft in its pure form, less than 1% of silicon or iron is added, which hardens and strengthens it.