10P7 Radiation

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Across
  1. 7. The most ionising, least penetrating radiation
  2. 9. J.J. Thomson's model of the atom
  3. 12. Neutrally charged particle with a relative mass of 1
  4. 13. Negatively charged particle that orbits nucleus
  5. 14. Version of an atom with more or less neutrons that normal
  6. 15. When a large unstable particle gives off radiation
Down
  1. 1. The least ionising, most penetrating radiation
  2. 2. Fire safety device that uses alpha radiation to work
  3. 3. Positively charged particle found in the nucleus
  4. 4. Medical technique used to treat brain tumors
  5. 5. Serious disease that can be caused by radiation
  6. 6. The time taken for half of a substance to decay
  7. 8. His experiment proved that the nucleus exists
  8. 10. Radiation give off when a neutron decays into a proton
  9. 11. Something that could fall apart at any moment
  10. 14. Atom that has gained or lost electrons