| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Physics |
| Lesson Topic: Know that a β-particle is a high-speed electron emitted from the nucleus, formed when a neutron changes into a proton and an electron and a reduction in the number of excess neutrons; the following change in the nucleus occurs during β-emission neutr |
Learning Objective/s:
- Describe the nuclear transformation that produces a β‑particle.
- Explain how β‑decay increases the atomic number while leaving the mass number unchanged.
- Compare the speed and penetrating ability of β‑particles with α‑particles and γ‑rays.
- Identify and correct common misconceptions about β‑decay.
- Apply the β‑decay equation to determine the daughter nuclide for a given parent.
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Materials Needed:
- Projector or interactive whiteboard
- PowerPoint slides with nuclear equations and diagrams
- Printed worksheet with practice decay equations
- Isotope cards (e.g., C‑14, N‑14) for a quick activity
- Clicker or online polling tool for concept checks
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Introduction:
Begin with a striking image of a cloud chamber showing a bright β‑track to capture interest. Ask students what they recall about α‑decay and invite them to predict how a different particle might behave. State that by the end of the lesson they will be able to explain the β‑decay process and its effect on the nucleus.
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Lesson Structure:
- Do‑now (5 min): Quick quiz on differences between α‑ and β‑decay displayed on the board.
- Mini‑lecture (10 min): Define β‑particle, show the neutron → proton + electron + antineutrino equation, and discuss the role of the antineutrino.
- Guided practice (10 min): Work through the Carbon‑14 → Nitrogen‑14 example; students fill in the nuclear equation on the worksheet.
- Concept‑check (5 min): Clicker questions targeting the five key points and common misconceptions.
- Comparison activity (8 min): Small groups complete a Venn diagram contrasting α‑ and β‑decay characteristics.
- Summary & exit ticket (7 min): Students write one correct statement about β‑decay and one misconception they have corrected on a sticky note.
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Conclusion:
Recap the transformation of a neutron into a proton and an electron, emphasizing the unchanged mass number and the increase in atomic number. Collect exit tickets to gauge understanding and assign a short homework: research another β‑emitter and write its decay equation.
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