Nuclear Energy

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Across
  1. 4. atom with different mass than average
  2. 5. positive charge
  3. 7. the amount of protons
  4. 12. Happens in nuclear fission
  5. 14. an electron
Down
  1. 1. spontaneous disintegration of atomic nuclei
  2. 2. Fuse together
  3. 3. A part of an atom with no charge
  4. 6. Center of the atom
  5. 8. the weight of an atom
  6. 9. helium particle
  7. 10. the time taken for the radioactivity of a specified isotope to fall to half its original value
  8. 11. Chain reaction
  9. 13. a radioactive energy