Across
- 1. - Amount of energy absorbed by a substance exposed to ionizing radiation
- 3. - Radiation from space that reaches the Earth's surface (Hint: Humans absorb about 26 millirem per year from this)
- 4. - Unit of equivalent dose, calculated by multiplying the absorbed dose by a factor (Hint: Symbol is rem)
- 8. - Unit of absorbed dose, equal to 1 × 10^5 Joule/g (Hint: Common unit is rad)
- 9. - Material that emits radiation due to the decay of its atomic nuclei
- 10. - Radioactive particles that settle on the ground after a nuclear explosion or accident
- 12. - Relatively massive and highly ionizing particle (Hint: Travels only a few centimeters in air)
- 14. Unit of activity, equal to 3.7 × 10^10 disintegrations per second
- 16. - Relating to the nucleus of an atom or involving atomic nuclei
- 19. - Type of radiation that can cause ionization in matter (Hint: Alpha and beta particles are examples)
- 20. - The property of certain substances to spontaneously emit radiation
Down
- 2. - Amount of ionization caused by radioactive material (Hint: Common unit is roentgen)
- 5. - The capacity to do work or produce heat (Hint: Average energy required to ionize an atom is about 35 electron volts)
- 6. - Process in which neutral atoms lose electrons and form positive ions
- 7. - Energy emitted as particles or electromagnetic waves (Hint: Can be ionizing or non-ionizing)
- 11. - Relatively light particle that ionizes only a fraction of the atoms in its path (Hint: Travels more than a meter in air)
- 13. The number of disintegrations per time (Hint: Common unit is curie)
- 15. - Unit of equivalent dose, measured in rem (Hint: Symbol is Q)
- 17. - Medical procedure that uses ionizing radiation to treat diseases (Hint: It is a form of cancer treatment)
- 18. - Unit of exposure, defined as the amount of radiation that produces ions in 1 cm^3 of dry air (Hint: Symbol is R)