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What is structural isomerism? What is the difference between position and chain isomerism? How are structural isomers for cycloalkanes and alkanes drawn? 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.
Slide 2 - Lesson objectives (see thumbnail image)
Slide 3 – Butane and methylpropane presented as structural isomers
Slide 4 – Definition of structural isomerism
Slide 5 – types of structural isomerism (chain and position) introduced to students
Slides 6 – 7: examples of chain and position isomerism so students can see the difference
Slides 8 – 13: A detailed method of how to identify and draw structural isomers from a molecular formula
Slides 14 – 25: Worked example 1 in detailed steps with clear animations
Slide 26 - learning pit-stop to check students’ learning. A series of questions of increasing difficulty, with the stretch and challenge (S+C) being the hardest. Answers animate onto the screen when you click
Slide 27 – Worked example 2 (alkane isomers)
Slide 28 – Worked example 3 (cycloalkane isomers)
Slide 29 - learning pit-stop to check students’ learning. A series of questions of increasing difficulty, with the stretch and challenge (S+C) being the hardest. Answers animate onto the screen when you click
Slides 30 - 37: Exam questions with mark scheme answers (included with the purchase of this resource)

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