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