Science · Pioneers 11–15 · Year 8
Chemistry: atoms, reactions and the periodic table
Why does iron rust but gold doesn't?
What you will learn
- Use the particle model to explain states and mixtures
- Describe atoms, elements, compounds and use chemical formulae
- Explain reactivity trends using the periodic table
- Plan a safe investigation with risk assessment and write a conclusion
Helpful to know first: States of matter
Discover
Think first: Why does iron rust but gold doesn't? Say or jot one idea before you read on.
Learn — core route
- Metal + acid reactivity series lab
- Build molecules with kits
- Chromatography of inks
Lessons in this subject: Learn Topics · Science
Practise — check a common mix-up
When wood burns, mass disappears.
An element and a compound are the same thing.
Apply / Create — Rust Prevention Investigation
Test three coatings on iron nails over a week; record, chart, explain with reactivity and conservation of mass, and recommend a coating.
Evidence type: experiment record · accessible alternative always allowed (speak it, draw it, or show an adult).
How it is judged (rubric)
- Beginning: Observes rust
- Developing: Table + one explanation
- Secure: Controlled test, chart, particle/reactivity explanation, recommendation
- Extending: Links to real-world cost and evaluates method
Explain — say what you did
Review later
We'll offer a quick memory check in 7, 21 and 45 days. Mark this done and your Today page will remind you gently.
For grown-ups · framework mappings
- aligned to UK NC · KS3 Chemistry: atoms, elements and compounds; chemical reactions
- aligned to NGSS · MS-PS1-2, MS-PS1-5
Status: Live · reviewed
What's next?