Nuclear chemistry

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Across
  1. 3. atom characterized by the number of protons
  2. 4. conversion of one chemical element
  3. 7. high speed electron
  4. 8. Series of chemical reactions
  5. 12. positively charged particle
  6. 13. nuclei combine
  7. 14. property of some unstable atoms
  8. 15. radioactive decay
Down
  1. 1. a reaction that involves change in atom
  2. 2. nucleus split into smaller nuclei
  3. 5. disintegration of radioactive substance
  4. 6. nuclear species of the same chemical element
  5. 9. basic building block of chemistry
  6. 10. electromagnetic radiation
  7. 11. Reduce to half of its initial value