Unit 4: Nuclear Chemistry

123456789101112131415161718192021222324252627
Across
  1. 2. treatment of disease with radiation, such as the use of gamma rays to kill rapidly dividing cancer cells
  2. 3. the combination of light atomic nuclei to form heavier ones with emission of large amounts of energy
  3. 5. badge used to measure radiation exposure, consisting of photographic film held in a small case that is pinned to clothing
  4. 8. the mass of uranium or plutonium required for a nuclear reaction to be self-sustaining
  5. 12. a weighted measure of radiation exposure that accounts for the ionizing power of the different types of radiation
  6. 14. the time it takes for one half of the parent nuclides in a radioactive sample to decay to the daughter nuclides
  7. 15. a nuclear particle that has the mass of an electron but carries a 1+ charge
  8. 20. the nuclide product of a nuclear decay
  9. 21. a technique used to estimate the age of fossils and artifacts through the measurement of natural radioactivity of carbon atoms in the environment
  10. 22. radiation emitted by an unstable nucleus consisting of alpha particles
  11. 23. a device used to detect radioactivity in which energetic particles traverse a material that emits ultraviolet or visible light when excited by their passage
  12. 24. the process by which a heavy nucleus is split into nuclei of smaller masses and energy is emitted
  13. 27. the original nuclide in a nuclear decay
Down
  1. 1. energetic electrons emitted by an unstable nucleus
  2. 4. a radioactivity detector consisting of a chamber filled with argon gas that discharges electrical signals when high-energy particles pass through it
  3. 6. the shortest-wavelength, most energetic form of electromagnetic radiation
  4. 7. expulsion of a positron from an unstable atomic nucleus; a proton is transformed into a neutron
  5. 9. high-energy, short-wavelength electromagnetic radiation emitted by an atomic nucleus
  6. 10. the ability of radiation to ionize other molecules and atoms
  7. 11. a particle consisting of two protons and two neutrons
  8. 13. the ability of a radioactive particle to penetrate matter
  9. 16. the emission of tiny, invisible, energetic particles from the unstable nuclei of atoms
  10. 17. the use of radioactive isotopes to identify disease in the body
  11. 18. a self-sustaining chemical or nuclear reaction yielding energy or products that cause further reactions of the same kind
  12. 19. an equation that represents the changes that occur during radioactivity and other nuclear processes
  13. 25. describes a substance that emits tiny, invisible, energetic particles from the nuclei of its component atoms
  14. 26. a form of radiation consisting of an energetic electron