Crossword Puzzle Time

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Across
  1. 3. Whatever is left over
  2. 5. Half of what makes up a nucleus, the other half being protons
  3. 9. Low energy radiation that CANNOT cause damage.
  4. 11. The amount of time it takes for HALF of something to change.
  5. 12. A giant wheel or fan that spins to generate power
  6. 14. A type of radiation that can be stopped by thin plastic or metal
  7. 16. More than one nucleus
  8. 17. The cloud that surrounds the nucleus in an atom
  9. 18. The splitting of the centre of an atom(The Nucleus)
Down
  1. 1. The gas or vapour that water is turned into when it is heated enough
  2. 2. Half of what makes up a nucleus, the other have being neutrons
  3. 4. the type of radiation that we can see
  4. 6. High energy radiation that CAUSES damage by knocking electrons out of atoms.
  5. 7. The name for things that have tiny unstable parts that shake and shoot out energy or bits of themselves.
  6. 8. A high energy type of radiation that can be stopped by thick concrete
  7. 10. The centre of an atom, made of neutrons and protons
  8. 13. A type of low energy radiation that can be stopped by skin or a piece of paper
  9. 15. A tiny building block that makes up everything; A nucleus surrounded by a cloud of electrons