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