Across
- 3. Heavy radioactive element that emits alpha particles upon decay
- 4. All elements have an ___________ form.
- 5. Weightless packets of energy
- 8. Radiation with enough energy to remove electrons from atoms
- 13. Spectrum that includes both ionizing and non-ionizing radiation
- 14. Can pass completely through the human body
Down
- 1. Elements that emit radiation as their atoms decay
- 2. The single largest source of man-made radiation exposure
- 6. Radiation that doesn't remove electrons
- 7. Genetic material that can be damaged by ionizing radiation
- 9. Particles from outer space that contribute to ionizing radiation
- 10. Fast-moving particles capable of penetrating the skin and causing damage
- 11. Process by which unstable atoms emit energy in the form of radiation
- 12. A particle made of two protons and two neutrons