Nuclear Energy Revision

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Across
  1. 4. Center of an atom
  2. 6. Most penetrating particle
  3. 8. time taken for an isotope to lose half of it's value
  4. 10. Positively charged particle
  5. 11. Located in the nucleus, has no charge
Down
  1. 1. Least reactive nobel gas
  2. 2. Most penetrating form of radiation
  3. 3. Most ionising form of radiation
  4. 5. Orbit of an electron
  5. 7. negatively charged particle
  6. 9. Creator of the plum pudding model