|aluminum (ə-l'mə-nəm) Pronunciation Key
Symbol Al A lightweight, silvery-white metallic element that is ductile, is found chiefly in bauxite, and is a good conductor of electricity. It is the most abundant metal in the Earth's crust and is used to make a wide variety of products from soda cans to airplane components. Atomic number 13; atomic weight 26.98; melting point 660.2°C (1,220.36°F); boiling point 2,467°C; specific gravity 2.69; valence 3. See Periodic Table.