Aluminum is the third most widespread element (after oxygen and silicon) and the most widespread of all metals on earth, but in nature it is found only in compounds. The most important aluminum ores are bauxite, cryolite corundum. It is a silver-gray, soft metal, which is characterized by its low density, excellent thermal and electrical conductivity, malleability, elongation and corrosion resistance. Aluminum is an amphoteric element – it dissolves in acids and alkaline hydroxides.
Aluminum keeps electricity well and is therefore used to make wires. It is also used to produce various items (alobal, coin, aluminum) and for the production of alloys (eg alumina, magnesium, copper and manganese). Significant use still exists in the alumino-thermic production of some metals.