Chemistry (AS Level)·Chemical bonding · NSSCAS 1.3.2–1.3.3
Electronegativity, bond polarity & molecular shapes
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Bonds are rarely a perfectly equal share. Learn electronegativity and how it makes bonds polar, then use electron-pair repulsion (VSEPR) to predict the shapes and bond angles of molecules — and see how a molecule's shape decides whether it is polar overall.
What you'll learn in this lesson
By the end you should be able to (NSSCAS Chemistry (AS Level) 1.3.2–1.3.3):
- Explain the concept of electronegativity
- Explain bond polarity, dipole moments and the behaviour of oxides with water in terms of electronegativity
- Explain the shapes of and bond angles in molecules using electron-pair repulsion (BF₃, CO₂, CH₄, NH₃, H₂O, SF₆, PF₅)
- Predict the shapes and bond angles of analogous molecules
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