This lesson looks at how to calculate the number of subatomic particles in an atom and how to draw and write the electron configuration for atoms.
Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:
- Click "Close Video"
- Click "Next" to view the activity
Your video will re-appear on the next page, and will stay paused in the right place.
This quiz is a great way for you to test your learning from this lesson.
If you would like to re-cap any of the lesson, or repeat any exercise, click ‘Back’ below.