Across
- 4. is positively charged particle.
- 9. radiation is radioactive radiation that passes through the air and produced charged particle.
- 12. Marie Curie died because of prolonged ______ to gamma rays.
- 13. has the lowest penetration power
- 17. Radioactive _______ is emitted when an unstable nucleus decay.
- 19. hands are used to handle radioactive substances safely.
- 20. example of ionising radiation
- 21. is the S.I unit for radioactivity.
- 22. quantity of biological effect from ionising radiation measured on human body
Down
- 1. is time taken for the number of undecayed nuclei to be reduced to half of its original value.
- 2. is used to determine the age of fossils and artifacts
- 3. particle is negatively charged.
- 5. is not deflected by electric field and magnetic field.
- 6. is used to determine the absorption rate of phosphate fertilisers in plants
- 7. is a random and spontaneous decay process of an unstable nucleus
- 8. Decay of ______ emitted Alpha particle.
- 10. Discovered X-ray
- 11. neutral particle
- 14. radiation is made up of various types of ionising radiation in the environment.
- 15. is example for natural sources of ionising radiation.
- 16. sheet can stop beta radiation.
- 18. emitted gamma rays to kill cancer cells.