Nuclear Energy

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Across
  1. 5. a particle with a helium nucleus
  2. 6. two or more elements with the same atomic number but different atomic mass
  3. 7. the total number of protons and neutrons in a nucleus
  4. 10. a chemical reaction process in which products promote the spread of the reaction
  5. 11. the central core of an atom consisting of protons and neutrons
  6. 12. a nuclear reaction in which two nuclei combine to form a single heavier one
  7. 13. a particle with a fast moving electron emitted with radioactive decay
  8. 14. a positively charged atom
Down
  1. 1. radiation an electromagnetic radiation emitted with an unstable nucleus
  2. 2. the time required for the atomic nuclei of a radioactive sample to decay
  3. 3. the emission of ionizing radiation or particles
  4. 4. a subatomic particle without an electric charge
  5. 8. a nuclear reaction in which a heavy nucleus splits
  6. 9. the number of protons in the nucleus of an atom