Across
- 1. Species of atom characterized by its nuclear composition
- 3. Quantity released in nuclear reactions
- 4. Energy emitted from radioactive substances
- 6. Splitting of a heavy atomic nucleus into smaller nuclei
- 7. Positively charged particle in the nucleus
- 9. are suitable as crossword answers, with the corresponding clues listed in the second column.
- 13. Spontaneous transformation of an unstable nucleus
- 14. Time required for half of a radioactive sample to decay
- 16. Device used to control nuclear chain reactions
- 18. Radioactive element commonly used as nuclear fuel
Down
- 2. Self-sustaining series of nuclear fission events
- 5. Combining of light nuclei to form a heavier nucleus
- 7. Artificial radioactive element used in reactors and weapons
- 8. Spontaneous emission of particles or energy from unstable nuclei
- 10. Negatively charged particle surrounding the nucleus
- 11. High-energy electromagnetic radiation from the nucleus
- 12. Neutral particle found in the nucleus
- 15. Radiation involving high-speed electrons or positrons
- 17. Central core of an atom containing protons and neutrons
- 19. Type of radiation consisting of helium nuclei
- 20. Atoms of the same element with different numbers of neutrons