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Decay equations past paper questions

Physics 9702 · Particle physics. Balancing nucleon number and charge in nuclear equations

In Cambridge A Level Physics 9702, Decay equations came up in 87 of the 140 papers on Paperstreak, for about 2 marks a paper when it does. It last came up in October/November 2025.

Often set with Beta decay and leptons, Hadrons, baryons and mesons, Quarks, Antiparticles and neutrinos.

92 questions, newest first

1. 9702/11/O/N/25 Question 38 · 1 mark
2. 9702/12/O/N/25 Question 40 · 1 mark
3. 9702/13/O/N/25 Question 38 · 1 mark
4. 9702/21/O/N/25 Question 6 part (b(i)) · 2 marks
5. 9702/22/O/N/25 Question 6 part (c(ii)) · 2 marks
6. 9702/23/O/N/25 Question 6 part (b(i)) · 2 marks
7. 9702/13/M/J/25 Question 40 · 1 mark
8. 9702/21/M/J/25 Question 7 part (a) · 3 marks
9. 9702/22/M/J/25 Question 7 part (b(ii)) · 3 marks
10. 9702/22/F/M/25 Question 7 parts (a) (c) · 4 marks
11. 9702/11/O/N/24 Question 39 · 1 mark
12. 9702/13/O/N/24 Question 40 · 1 mark
13. 9702/21/O/N/24 Question 5 part (a(i)) · 2 marks
14. 9702/22/O/N/24 Question 6 parts (b(i)) (b(ii)) · 3 marks
15. 9702/12/M/J/24 Question 37 · 1 mark
16. 9702/12/M/J/24 Question 39 · 1 mark
17. 9702/13/M/J/24 Question 38 · 1 mark
18. 9702/21/M/J/24 Question 7 part (b(iii)) · 3 marks
19. 9702/23/M/J/24 Question 6 part (b(ii)) · 2 marks
20. 9702/12/F/M/24 Question 39 · 1 mark
21. 9702/22/F/M/24 Question 4 part (a) · 2 marks
22. 9702/22/F/M/24 Question 8 parts (c(ii)) (c(iii)) · 2 marks
23. 9702/11/O/N/23 Question 39 · 1 mark
24. 9702/22/O/N/23 Question 7 part (b) · 2 marks
25. 9702/23/O/N/23 Question 8 part (a(ii)) · 2 marks
26. 9702/11/M/J/23 Question 39 · 1 mark
27. 9702/12/M/J/23 Question 39 · 1 mark
28. 9702/13/M/J/23 Question 39 · 1 mark
29. 9702/21/M/J/23 Question 8 part (a(ii)) · 2 marks
30. 9702/12/F/M/23 Question 39 · 1 mark
31. 9702/22/F/M/23 Question 7 part (a(ii)) · 2 marks
32. 9702/11/O/N/22 Question 39 · 1 mark
33. 9702/13/O/N/22 Question 39 · 1 mark
34. 9702/23/O/N/22 Question 6 part (a) · 2 marks
35. 9702/11/M/J/22 Question 39 · 1 mark
36. 9702/12/M/J/22 Question 39 · 1 mark
37. 9702/13/M/J/22 Question 39 · 1 mark
38. 9702/21/M/J/22 Question 7 part (a(i)) · 2 marks
39. 9702/22/M/J/22 Question 7 part (a(i)) · 2 marks
40. 9702/23/M/J/22 Question 7 part (a(i)) · 3 marks
41. 9702/12/F/M/22 Question 39 · 1 mark
42. 9702/22/F/M/22 Question 7 part (a(ii)) · 2 marks
43. 9702/11/O/N/21 Question 39 · 1 mark
44. 9702/12/O/N/21 Question 39 · 1 mark
45. 9702/13/O/N/21 Question 39 · 1 mark
46. 9702/21/O/N/21 Question 6 part (b(i)) · 1 mark
47. 9702/22/O/N/21 Question 7 part (d(i)) · 2 marks
48. 9702/11/M/J/21 Question 39 · 1 mark
49. 9702/12/M/J/21 Question 39 · 1 mark
50. 9702/12/F/M/21 Question 39 · 1 mark
51. 9702/11/O/N/20 Question 39 · 1 mark
52. 9702/23/O/N/20 Question 7 part (c(i)) · 1 mark
53. 9702/12/M/J/20 Question 39 · 1 mark
54. 9702/21/M/J/20 Question 6 part (b(iii)) · 2 marks
55. 9702/22/M/J/20 Question 7 part (a(i)) · 2 marks
56. 9702/23/M/J/20 Question 7 part (c(i)) · 2 marks
57. 9702/11/O/N/19 Question 39 · 1 mark
58. 9702/13/O/N/19 Question 39 · 1 mark
59. 9702/21/O/N/19 Question 7 part (a(i)) · 1 mark
60. 9702/22/O/N/19 Question 7 part (a) · 2 marks
61. 9702/23/O/N/19 Question 7 part (a) · 2 marks
62. 9702/12/M/J/19 Question 38 · 1 mark
63. 9702/12/F/M/19 Question 39 · 1 mark
64. 9702/11/O/N/18 Question 39 · 1 mark
65. 9702/13/O/N/18 Question 38 · 1 mark
66. 9702/21/O/N/18 Question 5 parts (c(i)) (c(ii)) · 4 marks
67. 9702/22/O/N/18 Question 8 part (b(i)) · 2 marks
68. 9702/11/M/J/18 Question 40 · 1 mark
69. 9702/13/M/J/18 Question 39 · 1 mark
70. 9702/23/M/J/18 Question 7 parts (a(i)) (a(ii)) · 2 marks
71. 9702/12/F/M/18 Question 39 · 1 mark
72. 9702/22/F/M/18 Question 6 part (a) · 1 mark
73. 9702/11/O/N/17 Question 39 · 1 mark
74. 9702/12/O/N/17 Question 39 · 1 mark
75. 9702/11/M/J/17 Question 39 · 1 mark
76. 9702/13/M/J/17 Question 37 · 1 mark
77. 9702/21/M/J/17 Question 7 part (b(i)) · 1 mark
78. 9702/23/M/J/17 Question 7 part (b(i)) · 1 mark
79. 9702/11/O/N/16 Question 40 · 1 mark
80. 9702/12/O/N/16 Question 39 · 1 mark
81. 9702/13/O/N/16 Question 40 · 1 mark
82. 9702/22/O/N/16 Question 6 part (b(iii)) · 3 marks
83. 9702/12/M/J/16 Question 38 · 1 mark
84. 9702/12/M/J/16 Question 40 · 1 mark
85. 9702/13/M/J/16 Question 38 · 1 mark
86. 9702/13/M/J/16 Question 39 · 1 mark
87. 9702/21/M/J/16 Question 7 part (c(i)) · 1 mark
88. 9702/22/M/J/16 Question 8 part (b(i)) · 2 marks
89. 9702/23/M/J/16 Question 8 part (b) · 2 marks
90. 9702/12/F/M/16 Question 39 · 1 mark
91. 9702/12/F/M/16 Question 40 · 1 mark
92. 9702/22/F/M/16 Question 6 part (a) · 2 marks

More in Particle physics: Alpha scattering and the nuclear atom, Nuclides and isotopes, Alpha, beta and gamma radiation, Antiparticles and neutrinos, Quarks, Hadrons, baryons and mesons, Beta decay and leptons.

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