« home

13 - Aluminium post-transition metal

Discovered by Hans Christian Ørsted in 1827

Aluminium

Aluminium (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.

Shell Electrons Orbitals
1 2 2 in 1s
2 8 2 in 2s + 6 in 2p
3 3 2 in 3s + 1 in 3p
AluminiumAl Electron 1 Electron 2 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2 Electron 3
27  u Atomic Mass
1.8  Å Atomic Radius
2.79k  K Boiling Point
1.21  Å Covalent Radius
2.7  g/cm³ Density
41.8 Electron Affinity
1.61 Electronegativity
5.99  eV First Ionization Energy
933  K Melting Point
3 Number of Shells
3 Electron Valency
13 Atomic Number
2, 8, 3 Electron Shell Occupations
0.897  J/(g K) Specific Heat