Physics Crossword

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Across
  1. 2. either a proton or a neutron
  2. 5. electromagnetic radiation in particle form
  3. 6. atom with one proton and neutron
  4. 8. type of electromagnetic radiation with a wavelength between 0.1 and 10 nm
  5. 10. produced by radios and astronomical events
  6. 13. electromagnetic radiation produced by nuclear events
  7. 14. nuclear glue
  8. 15. negatively charged subatomic particle
  9. 16. matter made up of the antiparticles of regular matter
  10. 17. 1/10 nm
  11. 20. a combination of two protons and two neutrons, a He4 nucleus
  12. 21. a subatomic particle with the same mass as an electron but a positive charge
Down
  1. 1. involves the breaking up of heavy nuclei
  2. 3. average energy per nucleon
  3. 4. when the protons or neutrons in an atom transforms into the other
  4. 7. involves the combining of light nuclei
  5. 9. about two Angstroms or 0.2 nm
  6. 11. atoms of the same element with a different number of neutrons
  7. 12. velocity/frequency
  8. 18. the center of an atom; made up of protons and neutrons
  9. 19. positively charges subatomic particles