Radioactivity

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Across
  1. 3. Radiation made of high-energy electrons or positrons
  2. 6. Energy emitted as particles or waves
  3. 7. High-energy electromagnetic radiation emitted during radioactive decay
  4. 9. SI unit of radioactivity
  5. 11. Time it takes for half of a radioactive substance to decay
Down
  1. 1. Material used to block or reduce radiation exposure
  2. 2. The process by which an unstable nucleus loses energy
  3. 4. Device worn to measure radiation exposure
  4. 5. Type of counter used to detect radiation
  5. 8. Type of radiation consisting of 2 protons and 2 neutrons
  6. 10. Natural radiation present in the environment