Work through the list without notes. If you cannot do a statement, follow its link, then come back. Guide = study guide; Practice = practice questions.
Understanding
- I can describe how particles are arranged and how they move in a solid, a liquid and a gas. (Guide: Figure 1; Practice Q1, Q4)
- I can explain the difference between a crystalline and an amorphous solid, with an example of each. (Guide: “Solids”; Practice Q1)
- I can explain how interparticle forces and particle packing affect the structure of a solid. (Guide: “Solids”)
- I can explain why a liquid flows and takes the shape of its container but keeps its volume. (Practice Q4)
- I can explain why a gas has no definite shape or volume. (Guide: “Gases”)
Skills
- I can draw particulate models of one substance in three phases, keeping the particles identical. (Guide: Worked example 1; Practice Q5)
- I can spot and correct errors in someone else’s particulate drawing. (Practice Q5)
- I can calculate molar volume from molar mass and density, converting between L and cm³. (Guide: Worked example 2; Practice Q3, Q6)
- I can estimate how much farther apart gas particles are than liquid particles using a cube root. (Practice Q6)
Reasoning
- I can explain why the solid and liquid phases of a substance have similar molar volumes. (Practice Q6)
- I can predict how compressing, heating or expanding a gas changes the spacing and collision frequency of its particles. (Guide: gas table; Practice Q2)
- I can explain how hydrogen bonding and temperature change the arrangement of molecules in a liquid. (Practice Q7)
- I can explain why a phase change does not break the covalent bonds inside molecules. (Practice Q5)
All ticked? Move on to Topic 3.4, Ideal Gas Law, or return to the course roadmap.