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Isotopes past paper questions

O Level Chemistry 5070 · Atoms, elements and compounds. 1 Define isotopes as different atoms of the same element that have the same number of protons but different numbers of neutrons 2 State that isotopes of the same element have the same chemical properties because they have the same number of electrons and therefore the same electronic configuration 3 Interpret and use symbols for atoms, e.g. 12 6C, and ions, e.g. 35 17Cl – 4 Calculate the relative atomic mass of an element from the relative masses and abundances of its isotopes

In Cambridge O Level Chemistry 5070, Isotopes came up in 34 of the 72 papers on Paperstreak, for about 2 marks a paper when it does. It last came up in October/November 2025.

Often set with Formulae, Ion and ionic bonds, Reversible reactions and equilibrium, Atomic structure and the Periodic Table.

39 questions, newest first

  1. 5070/21/O/N/25 Question 2 · 4 marks
  2. 5070/22/O/N/25 Question 2 · 4 marks
  3. 5070/11/M/J/25 Question 4 · 1 mark
  4. 5070/11/M/J/25 Question 5 · 1 mark
  5. 5070/12/M/J/25 Question 6 · 1 mark
  6. 5070/11/O/N/24 Question 5 · 1 mark
  7. 5070/11/O/N/24 Question 8 · 1 mark
  8. 5070/12/O/N/24 Question 3 · 1 mark
  9. 5070/12/O/N/24 Question 4 · 1 mark
  10. 5070/21/O/N/24 Question 1 part (b) · 2 marks
  11. 5070/22/O/N/24 Question 1 part (b) · 2 marks
  12. 5070/11/M/J/24 Question 4 · 1 mark
  13. 5070/12/M/J/24 Question 4 · 1 mark
  14. 5070/21/M/J/24 Question 7 part (d) · 3 marks
  15. 5070/22/M/J/24 Question 7 part (d) · 3 marks
  16. 5070/11/O/N/23 Question 4 · 1 mark
  17. 5070/12/O/N/23 Question 4 · 1 mark
  18. 5070/21/O/N/23 Question 2 part (d) · 2 marks
  19. 5070/22/O/N/23 Question 2 part (b) · 2 marks
  20. 5070/11/M/J/23 Question 3 · 1 mark
  21. 5070/12/M/J/23 Question 3 · 1 mark
  22. 5070/21/M/J/23 Question 4 part (a) · 3 marks
  23. 5070/22/M/J/23 Question 4 part (a) · 3 marks
  24. 5070/11/O/N/22 Question 7 · 1 mark
  25. 5070/21/O/N/22 Question 8 part (c) · 2 marks
  26. 5070/22/O/N/22 Question 8 part (c) · 2 marks
  27. 5070/11/M/J/22 Question 6 · 1 mark
  28. 5070/11/M/J/22 Question 7 · 1 mark
  29. 5070/12/M/J/22 Question 6 · 1 mark
  30. 5070/12/M/J/22 Question 7 · 1 mark
  31. 5070/21/M/J/22 Question 4 parts (a) (c) · 2 marks
  32. 5070/22/M/J/22 Question 4 parts (a) (b) (c) · 3 marks
  33. 5070/21/O/N/21 Question 7 part (b) · 3 marks
  34. 5070/22/O/N/21 Question 7 part (b) · 3 marks
  35. 5070/21/M/J/21 Question 2 parts (d(i)) (d(ii)) · 2 marks
  36. 5070/22/M/J/21 Question 2 parts (c(i)) (c(ii)) · 2 marks
  37. 5070/21/O/N/20 Question 9 part (b) · 2 marks
  38. 5070/22/O/N/20 Question 9 part (a) · 2 marks
  39. 5070/11/M/J/20 Question 7 · 1 mark

More in Atoms, elements and compounds: Elements, compounds and mixtures, Atomic structure and the Periodic Table, Ion and ionic bonds, Simple molecules and covalent bonds, Giant covalent structures, Metallic bonding.

Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.