Isotopes Examples and Exercises

Back to Chemistry Grade 9/10

This video is a basic chemistry video that covers the concepts below. It is aimed to meet the GCSE (high school grade 9/10) requirements in Unit 1 Chemistry and Science A Unit 2.



Check out the bottom of this page for associated resources.

Isotopes have the same atomic number, but different mass number.

Each chemical element is made up of atoms that have the same numbers of protons, but sometimes they have differing numbers of neutrons. These atoms are known as isotopes. The video above goes through a couple of examples of isotopes, and there are more for you to work through in the exercise worksheet below.

Exercise Worksheet

If you'd like to work through some more on your own, download the complementary exercises here to consolidate your understanding:


Make notes

Want to make notes as you follow along? Click on this image to download the document: