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13Al26.982
Aluminium
Post-Transition MetalAluminium (or aluminum; see different endings) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal, in the Earth's crust.
Phase: SolidAppearance: silvery gray metallic
2, 8, 3
Physical Properties
Atomic Mass26.98153857 u
Density2.7 g/cm³
Melting Point933.47 K
Boiling Point2743 K
Molar Heat24.2 J/(mol·K)
Period3
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p1
Semantic Config[Ne] 3s2 3p1
Shells2, 8, 3
Electron Affinity41.762 kJ/mol
Electronegativity1.61
Ionization Energies
IE1: 577.5 kJ/molIE2: 1816.7 kJ/molIE3: 2744.8 kJ/molIE4: 11577 kJ/molIE5: 14842 kJ/molIE6: 18379 kJ/molIE7: 23326 kJ/molIE8: 27465 kJ/molIE9: 31853 kJ/molIE10: 38473 kJ/molIE11: 42647 kJ/molIE12: 201266 kJ/molIE13: 222316 kJ/mol
Discovery
Named byHumphry Davy