Nuclear Chem

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Across
  1. 2. number of protons in the nucleus
  2. 6. rearrangement of DNA when hit by radiation
  3. 8. smallest particle of an element
  4. 9. determines which chemical element it is
  5. 11. circles around the nucleus
  6. 12. amount of time it takes for half of a radioactive element to transform something else
  7. 14. consist of two protons and two neutrons
  8. 17. measured in rems
  9. 19. referring to the particles that make up the nucleus
  10. 20. atom or group of atoms that has a positive or negative charge
  11. 21. atoms of the same element with different numbers of neutrons
Down
  1. 1. two smaller nuclei combine to form a larger nucleus
  2. 3. a subatomic particle with no charge
  3. 4. high speed electron emitted by the radioactive decay of an atomic nucleus
  4. 5. have no mass and no electric charge
  5. 7. composed of protons and neutrons
  6. 10. unstable atomic nucleus loses energy by radiation
  7. 13. number of protons and neutrons in the nucleus of an atom
  8. 15. simplest form of matter that has a unique set of properties
  9. 16. splits into two smaller nuclei buy a neutron
  10. 18. positively charged central core of an atom