Radioactivity

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Across
  1. 5. a very high-energy electromagnetic wave that is produced when the protons and neutrons in a nucleus rearrange
  2. 7. when a nucleus undergoes a nuclear reaction and emits radiation
  3. 9. a small, negatively charged particle that can be ejected from a nucleus during a nuclear reaction; it is identical to an electron
  4. 10. any form of radiation that has the ability to remove electrons from atoms and molecules
  5. 11. rays or particles that are emitted by a nucleus during a nuclear reaction
  6. 12. nuclear radiation that is made up of beta particles
Down
  1. 1. a particle made up of two protons and two neutrons, making it identical to a helium nucleus
  2. 2. a form of ionising radiation made up of gamma rays
  3. 3. emitting radiation
  4. 4. a form of ionising radiation made up of alpha particles
  5. 6. radiation that travels through a vacuum as waves rather than particles
  6. 8. an isotope with a nucleus that may undergo a nuclear reaction