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Atoms, periodic table and reactions
Atoms, periodic table and reactions · Year 10 Science · Science understanding
These lessons connect atomic structure to how the periodic table is organised, then build patterns in chemical reactions and what changes how fast a reaction goes. Work through the units in order if you are new to the topic, or jump to the part you need.
Checklist wording (official): Atoms, periodic table and reactions (curriculum) · Knowledge check: Atoms, periodic table and reactions
Units
| Unit | Focus |
|---|---|
| 1 · Atomic structure | Protons, neutrons, electrons; atomic number; ions; isotopes; shells and valence electrons (nuclear model). |
| 2 · Periodic table and trends | Periods and groups; why groups behave like “families”; radius and related trends at Year 10 level. |
| 3 · Reaction types | Synthesis, decomposition, displacement — recognise patterns from word equations and symbols. |
| 4 · Reaction rates | Temperature, concentration, surface area, catalysts — tie ideas to collisions and activation energy. |
Big-picture outcomes
By the end of this topic you should be able to:
- Explain how protons, electrons and neutrons fit the nuclear model and use atomic number to name the element.
- Relate valence electrons and group position to similar chemistry within a group.
- Classify reactions as synthesis, decomposition or displacement and justify your choice.
- List several factors that change reaction rate and say whether they tend to speed up or slow down a reaction, using a particle collision story where asked.