Physics

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Across
  1. 2. nuclear force the force that holds particles together
  2. 4. energy energy the holds nucleus together
  3. 6. mass unit to express atomic weights
  4. 7. a subatomic particle
  5. 8. nuclear force responsible for beta and decay of hadrons
  6. 9. reaction change the identity of the atomic nucleus
  7. 10. when things are being done
  8. 14. emission of ionizing radiation
  9. 16. splitting
  10. 17. production changing of radiation quantum to electron and positron
  11. 18. decay atomic nucleus loses energy
  12. 20. reaction a chemical reaction of products
  13. 21. number total # of protons and neutrons
Down
  1. 1. joining two or more things together
  2. 3. elementary particle of matter
  3. 5. specific # of protons and neutrons
  4. 9. a proton or neutron
  5. 11. half of the radioactive value
  6. 12. model math model of elementary particles of matter
  7. 13. decay when an electron is emitted
  8. 15. carriers give rise to forces between other particles
  9. 19. decay # of reduced by 4 an atomic number by 2