Which statement correctly defines an alloy?

• A. A substance composed of a single metal.
• B. A substance composed of two or more metals.
• C. A non-metal compound used in funeral supplies.
• D. A mixture of wood and metal particles.

Answer: (B)

An alloy is created when two or more elements, usually metals, are combined to form a new substance with properties that differ from its components. The statement describing two or more metals best fits this idea because it emphasizes the metal-based, engineered nature of alloys—materials designed for improved strength, hardness, or durability. Examples you may already know include bronze (copper and tin), brass (copper and zinc), and steel (iron and carbon), which illustrate how combining elements changes the material’s characteristics.

The other descriptions don’t capture what an alloy is: a pure metal is just a single element; a non-metal compound isn’t about combining metals; and a mixture of wood and metal particles isn’t a chemically bound alloy, but a heterogeneous material.