Atoms and Radiation

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Across
  1. 1. An electromagnetic wave released during radioactive decay
  2. 4. A colourless and odourless gas responsible for most natural background radiation
  3. 5. The name given to rays from space that are a natural source of background radiation
  4. 6. Negatively charged particles that orbit the nucleus of atoms
  5. 8. A positively charged particle found in the nucleus of an atom
  6. 11. The term used to describe atoms that decay giving out radiation
  7. 12. The process used to produce nuclear power which produces some of the man-made background radiation
  8. 13. A particle released during radioactive decay that is a fast moving electron
Down
  1. 2. A particle released during radioactive decay containing two neutrons and two protons
  2. 3. An atom of an element with a different number of neutrons in the nucleus
  3. 5. A nuclear reactor accident that released large amounts of radiation took place here
  4. 7. A man-made source of radiation used in hospitals to detect broken bones
  5. 9. A particle with no charge found in the nucleus of an atom
  6. 10. A rock containing the radioactive metal Uranium that is responsible for some natural background radiation