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What is electronegativity? What is a polar covalent bond? How does it lead to dipoles? Are all molecules with polar bonds polar overall? 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 – Definition of electronegativity presented to students
Slides 4 – 9: Pauling electronegativity scale with explanation of trends
Slide 10 - 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 11 – Hinge question: Do you like sharing?
Slide 12 – discussion of electron sharing which leads to formation of pure covalent bond
Slides 13 – 14: Discussion of electron sharing which leads to formation of polar covalent bond (with definitions of polar covalent bond and dipole included)
Slides 15 – 16: Discussion of electron transfer which leads to formation of ionic bond
Slides 17 – 19: Bonding type continuum visual representation
Slide 20 – Table which shows how we can use electronegativity values to predict the bonding type in a compound
Slide 21 - 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 22 – Representing polar covalent bonds using different notations
Slides 23 – 25: A molecule with polar bonds is not necessarily a polar molecule. Explanation based on symmetry and cancelling of dipole moments cancelling
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
Slides 27 – 30: ALT (Applied learning time) – independent practice for students to embed their learning through an extended task. Answers animate on the screen as you click
Slides 31 – 35:Exam questions with mark scheme answers (included with the purchase of this resource)

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