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Recognise Particle Diagrams of Pure Substances

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

'Recognise Particle Diagrams of Pure Substances' worksheet

Key stage:  KS 3

Year:  Year 8 Science worksheets

Curriculum topic:   Chemistry: Pure and Impure Substances

Curriculum subtopic:   Identifying Pure Substances

Difficulty level:  

Worksheet Overview

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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