Final answer:
An alloy is a mixture composed of two or more metals that often have superior properties compared to pure metals. Brass and bronze are common examples of alloys used in various applications.
Step-by-step explanation:
An alloy is a mixture composed of two or more elements, at least one of which is a metal. Alloys such as brass (copper and zinc) and bronze (copper and tin) are commonly used in manufactured items because their properties are often superior to those of pure metals. For example, bronze is harder than copper and more easily cast, while brass is malleable and has excellent acoustic properties, making it useful for musical instruments.