# Alloy

A mixture of a metal with another element, usually another metal. Alloys are often harder than pure metals.

Chemistry (school) · Part 03: Bonding and structure · Card 9 of 9 · Last updated 2026-10-19

## Analogy

Different-sized balls mixed in a box can not roll over each other, so the box is stiffer.

## In practice

Steel is iron mixed with a little carbon. It is much stronger than pure iron.

## Practice

### Flashcards

- **What is an alloy?** A mixture of a metal with another element, such as steel.

## Questions people ask

### Why is an alloy harder than a pure metal?

In a pure metal the atoms are all the same size, so layers slide over each other easily. In an alloy, atoms of other elements are different sizes and distort the pattern. This stops the layers from sliding, so the alloy is harder and stronger.

### What are some common alloys and their uses?

Steel, iron with a little carbon, builds bridges and cars. Brass, copper and zinc, is used for musical instruments and taps. Bronze, copper and tin, is used for statues and medals. Solder, tin and lead or similar metals, joins wires in electronics.

## Related concepts

- [Metallic bonding](https://studyvisually.com/learn/science/chemistry-school/chemistry-school-part-3/chemistry-school-part-3-concept-4)
- [Metal](https://studyvisually.com/learn/science/chemistry-school/chemistry-school-part-2/chemistry-school-part-2-concept-4)

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