Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Identify Atoms and Molecules in Diagrams

In this worksheet, students will practise identifying atoms and molecules from diagrams.

'Identify Atoms and Molecules in Diagrams' worksheet

Key stage:  KS 3

Year:  Year 8 Science worksheets

Curriculum topic:   Chemistry: Atoms, Elements and Compounds

Curriculum subtopic:   Simple Atomic Model

Difficulty level:  

Worksheet Overview

What do you think you're made of?


girl thinking


You are made up of lots of different parts, but if we think even smaller we can conclude that every single part of you is actually made of atoms! In fact, everything in the universe is made of atoms.


Atoms are the simplest particle of an element. Different things are made of different types of atoms. A piece of gold for example is made up of lots of gold atoms. Oxygen is made up of oxygen atoms. 


We can't see individual atoms with the human eye as they are just so small. Only the most powerful microscopes can see them.

Atoms have a radius of about one nanometre. It's hard to think about what this actually means ...... so look at a centimetre on a ruler. How many atoms do you think would need to be lined up in a row to stretch that centimetre?


centimetre ruler


 Ready for it.......... 100,000,000! 


Because we can't easily see atoms (without the use of a very powerful microscope!) we can represent atoms as small balls, and when we draw them we often just draw small circles. Each small circle would represent a single atom. 


blue sphere


All atoms of the same type would be drawn as the same size and colour circle. Atoms from different elements would be drawn as different colours, and maybe even different sizes. Atoms of the same type can be joined together if it's just a single element, or joined in pairs if it's a molecule of an element, and atoms of different types can join together to form compounds. But remembering that atoms of the same type are all drawn as the same colour, you can easily determine if a picture of a molecule shows just one type of atom or many. 


Let's have a look at this in some more detail!

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started

Try an activity or get started for free

  • National Tutoring Awards 2023 Shortlisted / Parents
    National Tutoring Awards 2023 Shortlisted
  • Private-Tutoring-WINNER-EducationInvestor-Awards / Parents
    Winner - Private Tutoring
  • Bett Awards Finalist / Parents
  • Winner - Best for Home Learning / Parents
    Winner - Best for Home Learning / Parents