Bananas and Radiation

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Across
  1. 1. An essential nutrient found in bananas
  2. 3. These types of countertops can contain radioactive elements
  3. 5. These types of elements emit radiation in the form of particles or waves
  4. 6. The radiation emitted from bananas falls in the range of natural ___ radiation
  5. 8. The type of radiation particles emitted by Potassium-40
  6. 9. A regulatory agency that affirms the radiation in bananas do not pose a health risk
Down
  1. 2. Spending time outdoors exposes one to radiation from the ___
  2. 4. Chemical element that has the same number of protons but different number of neutrons in its atomic nucleus
  3. 6. A popular and nutritious fruit enjoyed worldwide
  4. 7. Type of radiation emitted from the sun and stars