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For current students only: click here.
About This Unit
In this unit, we build on atomic structure to understand how atoms combine to form compounds. You’ll learn how the arrangement of atoms, ions, or molecules, and the forces between them, explain the properties of different materials. A key focus is on chemical bonds, how electronegativity affects bonding, and how the periodic table helps predict the type of bond that forms.
We’ll practice drawing and interpreting Lewis structures to show molecular shapes, bond angles, and polarity. You’ll also use models like VSEPR theory and Coulomb’s law to connect bonding at the atomic level with real-world properties. This unit emphasizes understanding patterns across scales, from small interactions between particles to the larger properties of substances.
By the end of Unit 2, you’ll be able to explain why some bonds are stronger than others, predict molecular geometry, and connect bonding models to observable chemical behavior – all skills that prepare you for success on the AP exam.
Essential Questions
- How are molecular compounds arranged?
- Why are some bonds easier to break than others?
- In what ways does a diagram drawn on paper accurately reflect the structure of a molecule? In what ways does it not accurately reflect the structure?
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