Question Video: Identifying the Alloying Metal in Brass Chemistry • 7th Grade

Fill in the blank: Brass is an alloy of copper and _.

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Video Transcript

Fill in the blank. Brass is an alloy of copper and blank.

Let us review our understanding of alloys, and then we can determine the answer to this relatively short question.

Alloys are metallic solid solutions that contain at least two different types of elements. There are lots of alloy substances in the world, and brass is one of the oldest. We know that copper is one of the elements in the brass alloy, and we need to determine the other one.

Brass has a characteristic yellow color that is somewhat similar to the color of pure gold. It is also more malleable than other alloys, such as bronze, meaning brass can be hammered or pressed into different shapes and thin sheets without breaking or cracking. Many manufacturers use brass to make musical instruments that have complex shapes and excellent acoustic properties. They press the highly malleable brass alloy into musical instruments like the trumpet or tuba.

Brass is highly malleable and has excellent acoustic properties because of its composition. It contains pure copper and some zinc metal as well. The ratio of elements in this alloy is approximately two parts copper to one part zinc. Therefore, the correct answer is zinc.

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