Target: describe the nucleus/electron energy-level model and state one limit of drawn rings. Prepare: Cards A/F and atom model mat.
- Launch · 2 min. Show the mat's unlabelled circle/dot convention and ask what a line around a nucleus might mean; do not accept “literal track” as observation.
- Model · 4 min. Mark nucleus inside and electrons outside on a word diagram. Explain that distinct energy levels are the teaching representation; the rings are not measured paths.
- Guided reading · 5 min. Read Card A in pairs. Distinguish a proton's positive charge, neutron's zero and electron's negative charge; keep actual energy/orbital calculations outside this session.
- Practice route · 7 min. Choose Day 1 route. Annotate/build/explain a fictional museum atom model with the three particle locations/charges and one diagram limit.
- Audit · 4 min. Partner says “electrons drive around the drawn circle.” Learner replaces it with an appropriately bounded model statement.
- Exit · 3 min. “What is inside the nucleus?” Key: protons and neutrons in this model; electrons are represented outside at energy levels.