RADIOACTIVITY

1234567891011121314151617181920
Across
  1. 2. : Energy emitted from radioactive substances
  2. 5. : Natural radiation present in the environment
  3. 7. : Splitting of a heavy nucleus into smaller nuclei
  4. 10. : The ability to do work; produced or released during nuclear reactions
  5. 13. : Natural breakdown of an unstable nucleus
  6. 14. : Atoms with the same number of protons but different neutrons
  7. 15. : The smallest unit of matter
  8. 16. : Radioactive isotope used to date fossils
  9. 19. : Joining of two light nuclei to form a heavier one
  10. 20. : High-frequency electromagnetic waves emitted in radioactive decay
Down
  1. 1. : A heavy element used as nuclear fuel
  2. 3. : The central part of an atom
  3. 4. : Positively charged particle in the nucleus
  4. 6. : The time taken for half of a radioactive substance to decay
  5. 8. : Process of releasing particles or energy from an unstable nucleus
  6. 9. : Negatively charged particle emitted in decay
  7. 11. : Instrument used to detect radiation
  8. 12. : Neutral particle in the nucleus
  9. 17. : Related to the nucleus of an atom or atomic energy
  10. 18. : Type of radiation particle, positively charged