Radioactivity

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Across
  1. 1. An alpha particle is the nucleus of this atom
  2. 5. Elements with the same number of protons but different numbers of neutrons
  3. 6. The charge of a proton, nucleus and alpha particle
  4. 7. this form of radiation is not a particle with mass
  5. 8. The mass of an alpha particle is approximately _________ times the mass of a proton
  6. 10. What happens to the atomic number when a beta negative particle is emitted
  7. 12. When an atom emits radiation
  8. 14. extra particle emitted with positron decay
Down
  1. 2. The ability to cause atoms to become charged
  2. 3. Beta positive particle
  3. 4. The most ionising form of radiation
  4. 9. An atom which could decay
  5. 11. Beta negative particle
  6. 13. Will stop alpha radiation
  7. 15. Where all nuclear radiation is emitted from