- Atomic Radius (Å)
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.
13
Atomic Number
26.98 u
Atomic Mass
933.4 K
Melting Point
2792 K
Boiling Point
2.7 g/cm³
Density
1.8 Å
Atomic Radius
1.21 Å
Covalent Radius
1.61
Electronegativity
5.99 eV
First Ionization Energy
41.76
Electron Affinity
3
Number of Shells
3
Electron Valency
2, 8, 3
Electron Shell Occupations
0.9 J/g
Specific Heat