Nuclear Reactions Puzzle

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Across
  1. 2. Atoms smashed together
  2. 5. Discovered Radiation
  3. 7. Atoms split apart
  4. 8. Particles released from the nucleus
  5. 9. Photon Particle
  6. 12. Reaction were the nucleus is split apart or fused with another nucleus
  7. 14. Negative, Neutral or Positive
  8. 15. Electron Particle
Down
  1. 1. Invented the Radio
  2. 3. Credited with the Atomic bomb
  3. 4. Minimum mass the isotope needs for chain reaction
  4. 6. Change neutrons to create an
  5. 10. 2 Protons, 2 Neutrons Particle
  6. 11. Unstable Nucleus
  7. 13. Changed by adding or removing protons