RE: What is aluminum foil substance, pure or mixture?
haomeialu > 03-23-2018, 08:57 AM
aluminum metal (symbol Al, atomic # 13) is an element and therefore a pure substance. That said, if something is made out of aluminum (like aluminum foil) it is rarely pure aluminum and is typically an alloy composed of mostly aluminum with other metals. Alloys are used to improve the properties of the pure substance in various ways depending on the desired use.