Which term describes a metal formed by combining two or more elements?

• A. bimetallic element
• B. alloy
• C. ferrous steel
• D. stainless steel

Answer: (B)

Alloys are materials created by combining two or more elements, typically to achieve properties that are better than any of the elements on their own. This describes the concept of forming a single metal with new characteristics. For example, steel is iron with carbon, and stainless steel adds chromium and other elements to improve corrosion resistance. The other terms don’t fit because a bimetallic element suggests two metals in distinct layers or phases rather than one homogeneous material; ferrous steel isn’t a standard term and would be misleading since steel is already iron-containing; stainless steel is a specific alloy, one example among many. The broad term that covers all these cases is alloy.