IP Physics Notes (Upper Secondary, Year 3-4): 17) Radioactivity
In one line
Trace nuclear structure, alpha/beta/gamma emissions, half-life maths, and safety protocols for IP nuclear physics.
Last updated 30 Nov 2025
Want small-group support? Browse our IP Physics Tuition hub. Not sure which level to start with? Visit Physics Tuition Singapore.
Planning a revision session? Use our study places near me map to find libraries, community study rooms, and late-night spots.
Read in layers
1 second
Read the summary above.
10 seconds
Scan the first few sections below.
100 seconds
Jump into the section that matches your decision.
- Start Here
- Rutherford Scattering Recap
- Nuclear Notation & Isotopes
- Types of Radioactive Emission
Q: What does IP Physics Notes (Upper Secondary, Year 3-4): 17) Radioactivity cover?
A: Trace nuclear structure, alpha/beta/gamma emissions, half-life maths, and safety protocols for IP nuclear physics.
Quick recap -- Unstable nuclei shed energy by emitting alpha, beta, or gamma radiation. Identify the emission, update the nuclide notation, and use half-life reasoning to track activity changes.
Start Here
| Read time | What to take away |
| 1 second | Radioactivity is unstable nuclei changing by emitting radiation. |
| 10 seconds | Alpha changes mass and proton number, beta changes proton number, gamma changes energy only, and half-life halves activity after each equal time interval. |
| 100 seconds | Use the decay equations, half-life example, and safety notes to practise balancing nuclear notation, reading activity changes, and choosing shielding or handling methods. |
Keep your practice loop tight via our IP Physics tuition hub-it links each topic here to quizzes, diagnostics, and WA-style problem sets.
New to the Integrated Programme? Start with What is IP? | Browse all free IP notes.
These notes align with SEAB GCE O-Level Physics (6091) content used in IP programmes (exams from 2026).
Status: SEAB O-Level Physics 6091 syllabus (exams from 2026) checked 2025-11-30 - scope unchanged; remains the reference for these notes.
Rutherford Scattering Recap
- Most alpha particles passed straight through gold foil -> atoms mostly empty space.
- Some deflected at large angles -> positive charge concentrated in tiny nucleus.
- A few rebounded -> nucleus is dense and carries most mass.
- Led to nuclear model: central nucleus (protons + neutrons) with orbiting electrons.
