Aluminum

Aluminium (Aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air.

Aluminium is a chemical element; it has symbol Al and atomic number 13. Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air. Wikipedia
Symbol: Al
Density: 2.7 g/cm³
Melting point: 660.3 °C
Atomic mass: 26.981539 u
Atomic number: 13
Electron configuration: [Ne] 3s²3p¹
Discoverer: Hans Christian Ørsted