Answer :
Final answer:
Aluminum, copper, and magnesium are commonly used metals with diverse applications ranging from construction to electronics. They are characterized by their ability to form protective coatings, which prevent rapid oxidation and corrosion, thereby extending their utility. Some metals are restricted in use due to toxicity concerns.
Explanation:
Aluminum, copper, and magnesium are examples of metals that are commonly used in various industries due to their distinctive properties. Aluminum, a Group 13 metal, is noted for its abundance in the Earth's crust and its use in a wide array of products like foil, cookware, and window frames. It is known for being lightweight and strong, especially when alloyed with elements such as silicon, copper, or magnesium. Aluminum is also produced economically through the process of electrolytic reduction of alumina.
Copper is a versatile metal with excellent electrical conductivity, which makes it ideal for use in electrical wiring and other electronic components. Magnesium is another active metal known for its lightweight and high strength-to-weight ratio, making it useful in construction and manufacturing, despite its tendency to burn brightly when ignited as powder, ribbons, or filaments.
All these metals have an important characteristic in common: they form a protective coating through passivation when exposed to air, slowing down their reaction and corrosion. This oxide or other compound layer protectively encapsulates the metal, extending its practical applications significantly. Despite this, the use of some metals like lead and mercury is restricted due to their toxicity.
