Uses of Radiation

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Across
  1. 2. any form of radiation that has the ability to remove electrons from atoms and molecules
  2. 4. radiation that travels through a vacuum as waves rather than particles
  3. 5. a method for judging the age of fossils by analysing the amount of carbon-14 in the fossil
  4. 11. emitting radiation
  5. 12. a particle made up of two protons and two neutrons, making it identical to a helium nucleus
Down
  1. 1. an isotope with a nucleus that may undergo a nuclear reaction
  2. 3. when a nucleus undergoes a nuclear reaction and emits radiation
  3. 6. a small, negatively charged particle that can be ejected from a nucleus during a nuclear reaction; it is identical to an electron
  4. 7. rays or particles that are emitted by a nucleus during a nuclear reaction
  5. 8. the amount of radiation absorbed over a period of time
  6. 9. a very high-energy electromagnetic wave that is produced when the protons and neutrons in a nucleus rearrange
  7. 10. the time it takes for half a sample of atoms to decay