Nuclear Chemistry

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Across
  1. 5. a subatomic particle with no charge
  2. 7. composed of neutrons and protons
  3. 8. combining nuclei of two atoms to form a heavier atom
  4. 9. unstable atomic nucleus loses energy by radiation
  5. 11. The nuclei split into smaller fragments
  6. 12. number of protons and neutrons in the nucleus of an atom
  7. 16. measured in rems
  8. 18. smallest particle of an element
  9. 20. an electron resulting from the breaking apart of neutrons in an atom
  10. 21. identical to the Helium nucleus
Down
  1. 1. positively charged subatomic particle
  2. 2. amount of time it takes for half of a radioactive element to transform into something else
  3. 3. negatively charged subatomic particle
  4. 4. an atom or group of atoms that has a positive or negative charge
  5. 6. composed with protons and neutrons
  6. 10. number of protons in the nucleus
  7. 13. simplest form of matter that has a unique set of properties
  8. 14. rearrangement of DNA when hit by radiation
  9. 15. has no mass, can be stopped by several inches of lead (pure energy)
  10. 17. atoms of the same element with different numbers of neutrons
  11. 19. occurs when an unhappy nucleus ejects 2 protons and 2 neutrons