13 Al 26.982
Aluminium
post-transition metal
Properties
- Atomic number
- 13
- Atomic mass
- 26.982 u
- Category
- post-transition metal
- Group
- 13
- Period
- 3
- Block
- p-block
- State (room temp)
- Solid
- Outer-shell electrons
- 3
- Electronegativity
- 1.61 (Pauling)
- Density
- 2.7 g/cm³
- Melting point
- 660.32 °C
- Boiling point
- 2469.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p¹
Noble-gas shorthand: [Ne] 3s² 3p¹
Electrons per shell: 2, 8, 3 — that's 3 in the outermost shell.
About 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.
- Named by Humphry Davy
- Appearance: silvery gray metallic
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.