nuclear vocab cross word

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Across
  1. 3. a particle emitted when the neutron splits
  2. 5. emitted from the nucleus
  3. 7. same element with different amounts of neutrons
  4. 8. spilitting
  5. 9. combining
  6. 12. the mass of the nucleus of one isotope of an element
Down
  1. 1. rhymes with crouton
  2. 2. the amount of time it takes for half the the element to decay
  3. 4. number of protons in the nucleus
  4. 6. the positive particle
  5. 10. high energy radiation
  6. 11. the energy or the particle thrown off of an radioisotope the nucleus of a radioactive isotope