A mixture of two or more elements at least one of which is a metal is called

Alloy

Explanation:

Alloy: An alloy is a substance prepared by adding one or more element to a base or parent metal to obtain desirable products. The added element are usually metals or carbon. An alloy can be considered as a uniform mixture.

Examples of Alloy:

⇒ Brass is an alloy that contains 60 - 80% of copper and 20 - 40% of zinc.

⇒Bronze is an alloy that contains 90% of copper and 10% of tin.

⇒ Steel is an alloy that contains 99.8% of iron and 0.2% of carbon.

Uses of Alloys:

⇒ They are used for making coins and medals

⇒ They are used in the construction of aircraft, ships and cars.

⇒They are used for making electromagnet.