Recognise Particle Diagrams of Pure Substances

In this worksheet, students will identify particle diagrams of pure substances.

Key stage: KS 3

Year: Year 8 Science worksheets

Curriculum topic: Chemistry: Pure and Impure Substances

Curriculum subtopic: Identifying Pure Substances

Difficulty level:

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Worksheet Overview

A pure substance is a substance made from only one element or one compound. And nothing else.

A mixture is not a pure substance because it contains more than one type of element or compound.

Let's have a look at some particle diagrams and see if you can work out whether or not they are pure substances.

molecules of an element

The box above shows a particle diagram of a gas. Does the diagram above show a pure substance or not? If you said it shows a pure substance, you would be correct! It is a gas made up of just one element. A pure substance.

How about this one below? Pure or not?

molecules of a nitrate

Did you say pure? Correct! It is made up of only one type of compound, so it is a pure substance.

Let's have a go at a few more questions now and attempt to recognise pure substances from particle diagrams.

girl thinking

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Preview activity

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