Crossword Puzzle: AS Level Physics (Atoms, Nuclei, and Radiation)

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Across
  1. 2. -Atomic Mass Unit The standard unit used to measure atomic masses.
  2. 5. -The general term for energy emitted by radioactive materials.
  3. 7. -A property of particles that determines their electromagnetic interaction.
  4. 9. -High-energy electromagnetic radiation.
  5. 11. - The antiparticle of an electron.
  6. 15. -Negatively charged particle orbiting the nucleus.
  7. 17. -The principle stating that total nucleon number and charge remain the same in nuclear reactions.
  8. 18. -Radiation consisting of high-speed electrons or positrons.
  9. 19. -The process of removing an electron from an atom, creating a charged particle.
  10. 20. -The small, dense core of an atom.
  11. 22. -Particle produced during beta-minus decay.
  12. 24. -Radiation consisting of two protons and two neutrons.
  13. 27. -Neutral particle in the nucleus.
  14. 28. -Particle produced during beta-plus decay.
  15. 29. -The process of a nucleus releasing radiation.
  16. 30. -The time taken for half the radioactive nuclei in a sample to decay.
Down
  1. 1. -Scientist who conducted the gold foil experiment.
  2. 3. -The joining of two small nuclei to form a larger one, releasing energy.
  3. 4. -The deflection of alpha particles in an experiment proving the existence of the nucleus.
  4. 6. -The process of an atom taking in energy.
  5. 8. -The splitting of a large nucleus into smaller ones, releasing energy.
  6. 10. -A particle with the same mass but opposite charge as its counterpart.
  7. 12. -General term for protons and neutrons.
  8. 13. -Number Another term for proton number.
  9. 14. -Positively charged particle in the nucleus.
  10. 16. -Term used to describe unstable elements that emit radiation.
  11. 21. -Number Another term for nucleon number.
  12. 23. -The path electrons follow around the nucleus.
  13. 25. -Atoms of the same element with different numbers of neutrons.
  14. 26. - The process by which unstable nuclei release energy.