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What is stereoisomerism? What is geometric isomerism? What is the cis/trans naming system? What is the E/Z naming system? What is cisplatin? All this and more covered in this comprehensive lesson with questions and answers! This is a Year 12 A level lesson for Edexcel International Unit 1 – WCH11, but it can also be used for all UK exam boards. All the slides in this lesson are fully animated and include answers to every mini plenary question and exam question. The breakdown of the slides (which are best opened on Microsoft PowerPoint) is as follows:

Slide 1 - Title and 5-minute starter. The starter is a grid of four questions entitled ‘last week, last lesson, today’s learning and future learning’. Use this generic slide for all your lessons by simply changing the questions and the answers each time. The key word for the lesson, sustainable, is displayed here with the definition
Slide 2 - Lesson objectives (see thumbnail image)
Slide 3 – Recap quiz on structural isomer, position isomers, etc.
Slides 4 – Meaning of prefix stereo-
Slide 5 – Meaning of stereoisomerism, including optical and geometric isomerism
Slides 6 – 7: definition of geometric isomerism, with explanation of restricted rotation around the double bond
Slide 8 – Cis/trans naming system with examples
Slide 9 – Mini whiteboard question testing students ability to use the cis/trans naming system – very low stakes
Slide 10 – Passing mention of the importance of geometric isomers, e.g. in medicine (cisplatin has biological activity, transplatin does not). This is not in the specification, but it’s interesting!
Slides 11 – 20: A series of worked examples to help students identify molecules which have geometric isomers
Slides 21 – 26: Independent practice - questions are in the slide on hidden slides and should be printed for the students. Answers animate on the screen when you are ready to review
Slides 27 – 31: Introduction to the E/Z naming system with one worked example
Slides 32 – 38: Exam questions with mark scheme answers (included with the purchase of this resource)

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