Section 24 - Particle Physics

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Across
  1. 3. What is the antiparticle of the electron?
  2. 6. What are atoms with the same proton number but different nucleon numbers?
  3. 7. Which quark has charge −1/3e?
  4. 8. What particles make up hadrons?
  5. 9. What principle applies when balancing quark equations?
  6. 11. What small dense centre of the atom was discovered?
  7. 14. What force is responsible for beta decay?
  8. 15. Which particle orbits the nucleus?
  9. 18. What type of particle was used in the scattering experiment?
  10. 19. What unit equals 10⁻¹⁵ m?
  11. 22. Which quark has charge +2/3e?
  12. 23. What decay emits a positron?
  13. 24. What is the quark structure of a proton?
  14. 25. What decay emits an electron?
  15. 26. What is the total number of protons and neutrons?
  16. 28. How does the nucleus compare in size to the atom?
  17. 29. What exists for every particle?
Down
  1. 1. What system uses X, Z and A to represent nuclei?
  2. 2. What group of particles includes protons and neutrons?
  3. 3. What determines the identity of an element?
  4. 4. What group of particles includes electrons and neutrinos?
  5. 5. What charge does the nucleus have?
  6. 10. Who led the alpha-particle scattering experiment?
  7. 12. What happened to a small number of alpha particles?
  8. 13. Which particle has charge +1?
  9. 16. What nuclear property depends on A¹ᐟ³?
  10. 17. What describes the range of the strong nuclear force?
  11. 20. How would you describe nuclear matter?
  12. 21. What force holds the nucleus together?
  13. 27. Which particle has no charge?