Aluminum (Al)

Aluminum is a chemical element with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal in the boron group.

Atomic Number

13

Atomic Mass

26.982 u

Category

post transition

Phase

solid

Density

2.7 g/cm³

Electron Shells

2, 8, 3

Atomic Structure

Protons: 13 • Electrons: 13 • Neutrons: Varies by isotope

Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p¹

Discovery

1824 • Hans Christian Ørsted