A fully-resourced lesson which explores how ions are formed from atoms. The lesson includes an engaging lesson presentation (33 slides) and an associated worksheet to be used during an understanding check.
The first part of the lesson focuses on atoms and specifically on getting students to recall that they contains the same number of protons and electrons and this is why they have no charge. By ensuring that they are confident with this fact, they will be able to understand why ions have a charge. Students will learn that ions have full outer shells of electrons and this change in the number of this sub-atomic particle leads to the charge. They are shown examples with aluminium and oxygen and then challenged to apply this new-found knowledge to a task where they have to explain how group 1, 2, 5 and 7 atoms become ions. The final part of the lesson looks at how ion knowledge can be assessed in a question as they have to recognise the electron configuration of one and describe how many sub-atomic particles are found in different examples. There are regular progress checks throughout the lesson to allow the students to check on their understanding.
This lesson has been written for GCSE students but could be used with higher ability KS3 students who are looking to extend their knowledge past basic atomic structure
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