All lessons › Chemistry detectives › Lesson 2
Australian primary science · Years 5–6 · enrichment · Lesson 2 of 3
Patterns in the Periodic Table
Inquiry question: Which predictions can a periodic-table pattern support?
Marked no materials needed
Analysing secondary data
What students learn
Compare groups and periods, make a cautious prediction, then check reference evidence.
Success criteria
- I can distinguish group and period.
- I can support a pattern with two examples.
- I can check a prediction and explain a limitation.
Preparation and materials
Before this lesson: Element names, symbols and atomic numbers; model helium first if needed.
- Charged iPad per student or pair — 13 (one per pair)
- Projector / teacher screen — 1
Teacher setup
- Allow 55 minutes: Start 5, Investigate 25, Explain 15, Apply and hand in 10.
- Open the assigned QR and slides. No physical chemicals, samples or printed sheets are needed.
- Use supplied evidence if research sites are blocked. Books use the same questions and headings.
Safety and adaptations
- On-screen inquiry only. Do not collect, taste or mix substances, open batteries or try reactions seen online.
Review your school policies and curriculum requirements before teaching.
How to investigate
The lesson sequence should leave pupils with evidence to interpret, not only an activity to finish.
- Find groups 18 and 1, then trace period 2. Describe the atomic-number order.
- Use two examples to predict argon's state and potassium's classification. Record before checking.
- Check their element information; record finding and source.
- Compare hydrogen with lithium, and oxygen with neon. Which broad claims fail?
- Write a supported pattern and a limitation. Challenge your partner's prediction respectfully.
Teacher modelling prompt
Trace group 18 and period 2 on the table. Model recording 'same group' separately from 'same element'. Leave argon's state for the investigation.
Record and explain evidence
Recording question: How useful are our patterns for prediction?
| Comparison / prediction | Evidence before checking | Checked finding and limitation |
|---|---|---|
| ________________ | ________________ | ________________ |
Example recording headings; record actual observations, including inconclusive results.
Discussion prompt
Which claim survives our comparisons?
Provided example or reference data
Starting reference evidence · pure elements at 20°C; ? = investigate
| Element / number | Group / period | State | Selected property |
|---|---|---|---|
| Helium / 2 | 18 / 1 | Gas | Very unreactive |
| Neon / 10 | 18 / 2 | Gas | Very unreactive |
| Argon / 18 | 18 / 3 | ? | Very unreactive |
| Lithium / 3 | 1 / 2 | Solid | Metal |
| Sodium / 11 | 1 / 3 | Solid | Metal |
| Potassium / 19 | 1 / 4 | Solid | ? |
| Hydrogen / 1 | 1 / 1 | Gas | Non-metal |
Check the data source in the teacher lesson. Illustrative or fictional data are not measurements collected by your class.
Check understanding
What should pupils know? How do group and period differ?
Explain with evidence: Explain your argon prediction and how you checked it.
Apply the idea: Evaluate: 'Every group 1 element is a solid metal at 20°C'.
Teacher answer guidance and saved classroom work are available through the main lesson experience where supported.