Aluminium

Aluminum [[Atomic mass|Aluminum/Atomic mass]] +3   [[Periodic table of elements|Aluminum/Atomic symbol]] [[Atomic number|Aluminum/Atomic number]] 1s22s22p63s23p1 13,3,p [ ? ] [[Aluminum/Periodic table of elements]]: Uses: Lewis acid catalysis Hazard: pyrophoric

Aluminum, officially aluminium by the International Union of Pure and Applied Chemistry, is a chemical element with atomic number Z = 13. It is the most reactive post-transition element metal, is the third most abundant element in the Earth's crust, and the most abundant metal in the Earth's crust.