Nuclear Radiation

123456789101112131415161718192021222324
Across
  1. 2. man made radioactive element used in reactors
  2. 3. material used to block radiation
  3. 7. neutral particle in nucleus
  4. 9. time for half of a radioactive sample to decay
  5. 10. high energy electromagnetic radiation
  6. 12. splitting of a nucleus into smaller parts
  7. 13. energy emitted as particles or waves
  8. 15. negatively charged particle orbiting nucleus
  9. 16. combining of nuclei to form a larger nucleus
  10. 17. presence of radioactive substances where unwanted
  11. 19. process by which unstable nuclei lose energy
  12. 21. low level radiation always present in environment
  13. 23. device used to detect radiation
  14. 24. atoms of same element with different neutrons
Down
  1. 1. process of removing electrons from atoms
  2. 4. high speed electron radiation
  3. 5. contact with radiation
  4. 6. device used to control nuclear reactions
  5. 8. series of nuclear reactions that sustain themselves
  6. 11. resistance of a nucleus to change
  7. 14. positively charged particle in nucleus
  8. 18. center of an atom containing protons and neutrons
  9. 19. amount of radiation absorbed
  10. 20. radioactive element used in nuclear fuel
  11. 22. alpha radiation made of helium nuclei