👩 Teacher’s Guide

🎯 Objective

Students will be able to:

• Understand the basic ideas of atomic structure
• Use correct science vocabulary
• Explain real-world uses and safety issues

📝 Teaching Notes

• Key idea to emphasize: Protons, neutrons, and electrons.
• Common misconception: All radiation is man-made (many sources are natural).
• Suggested teaching approach:
  • Use simple diagrams and analogies
  • Connect to medicine, energy, and everyday life
  • Keep explanations age-appropriate and clear

💬 Discussion Starter

Ask students:

• Why do atoms have different isotopes?
• How can radiation be both useful and dangerous?

🧒 Student Worksheet

Concept and Helping Material

Protons, neutrons, and electrons.

Vocabulary and Definitions

• — Protons, neutrons, and electrons.
• — In the nucleus.
• — In shells (energy levels) around the nucleus.
• — Positive charge.
• — Negative charge.

Hands-On Experiment or Activities

Activity 1: Coin half-life model
What You Need: 30 coins
What You Do: Toss coins, remove heads each round, record remaining.
Think and Talk: What changed? What stayed the same?

Activity 2: Radiation shielding demo (safe simulation)
What You Need: flashlight, paper, cardboard, thick book
What You Do: Shine light through materials to model penetration differences.
Think and Talk: What changed? What stayed the same?

Practice Questions (QA)

1. What are the three main particles inside an atom?
2. Where are protons and neutrons found?
3. Where are electrons found?
4. What charge does a proton have?
5. What charge does an electron have?
6. What charge does a neutron have?
7. Why is an atom usually neutral overall?
8. What is the atomic number?
9. What is the mass number?
10. Which particle has very little mass compared to the others?

Reflection

• Why is learning about atomic structure important?
• What is one way to reduce radiation risk?