What is the chemical composition of aluminum foil?

Aluminum foil is primarily composed of aluminum, which is a lightweight and malleable metal with the chemical symbol Al and atomic number 13. It is usually made from high-purity aluminum, which is about 99% pure. Sometimes, it may contain trace amounts of other elements to enhance certain properties, such as iron or silicon, but these are typically present in very small quantities. Aluminum's high reflectivity, low density, and resistance to corrosion make it ideal for use in foil form.