Across
- 2. taken for half the radioactive nuclei in a sample to decay
- 4. Central part of an atom where protons and neutrons are found
- 8. High-energy electromagnetic radiation from the nucleus
- 10. by which an unstable nucleus loses energy
- 11. Atoms of the same element with different numbers of neutrons
- 12. Radiation that is always present in the environment
- 14. Type of radiation consisting of high-speed electrons or positrons
- 15. Device used to detect radiation
Down
- 1. Detector that shows visible tracks of charged particles
- 3. Process of knocking electrons off atoms
- 5. Detector that darkens when exposed to radiation
- 6. Material used to block or reduce radiation
- 7. gas from uranium decay
- 9. Type of radiation consisting of helium nuclei
- 13. Uncharged particle in the nucleus