Give a characteristic to the element with serial number 13.

Aluminum (Al) is a chemical element, light, silvery-white metal of the main group 13 of the periodic table. Aluminum is the most abundant metallic element in the earth’s crust and the most widely used non-ferrous metal. Because of its chemical activity, aluminum never occurs in metallic form by nature, but its compounds are present to a greater or lesser extent in almost all rocks, vegetation and animals. Aluminum is found in igneous rocks mainly as aluminosilicates.