Past paper questions, key definitions, and mark schemes — all files verified from our archive.
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📝 Key Concepts & Definitions
- Atom: protons + neutrons in nucleus, electrons in shells
- Atomic number (Z): number of protons
- Mass number (A): number of protons + neutrons
- Isotopes: same Z, different A (different neutron count)
- Alpha particle: helium nucleus (²₄He), low penetration
- Beta particle: high-speed electron (⁰₋₁e), moderate penetration
- Gamma ray: electromagnetic wave, highest penetration
- Half-life: time taken for half the nuclei to decay
+ more definitions available in the full revision notes
🃏 Key Formulas & Equations
Alpha particle: helium nucleus (²₄He), low penetration
❓ Questions by Topic
✅ 23 verified PDF links — all files confirmed on server
📅 2022-2024 papers (5 available)
- 📄 2022 Jun – P21 (QP P21)📝 MS
- 📄 2022 Mar – P22 (QP P22)📝 MS
- 📄 2022 Mar – P32 (QP P32)📝 MS
- 📄 2022 Jun – P32 (QP P32)📝 MS
- 📄 2022 Jun – P33 (QP P33)📝 MS
📅 2018-2021 papers (18 available)
- 📄 2020 Jun – P11 (QP P11)📝 MS
- 📄 2020 Nov – P11 (QP P11)📝 MS
- 📄 2021 Nov – P13 (QP P13)📝 MS
- 📄 2021 Jun – P13 (QP P13)📝 MS
- 📄 2019 Jun – P13 (QP P13)📝 MS
- 📄 2018 Nov – P21 (QP P21)📝 MS
- 📄 2021 Jun – P21 (QP P21)📝 MS
- 📄 2020 Jun – P21 (QP P21)📝 MS
- 📄 2020 Nov – P22 (QP P22)📝 MS
- 📄 2018 Jun – P22 (QP P22)📝 MS
- 📄 2021 Jun – P22 (QP P22)📝 MS
- 📄 2021 Nov – P22 (QP P22)📝 MS
- 📄 2021 Nov – P23 (QP P23)📝 MS
- 📄 2018 Jun – P23 (QP P23)📝 MS
- 📄 2019 Jun – P23 (QP P23)📝 MS
- 📄 2021 Jun – P31 (QP P31)📝 MS
- 📄 2021 Jun – P41 (QP P41)📝 MS
- 📄 2021 Jun – P43 (QP P43)📝 MS
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