In this lesson, we will describe the structure of an atom, understand the difference between atomic mass and atomic number. Calculate the number of protons, neutrons, and electrons within an atom.
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These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.