Across
- 2. a large thickness of this metal will absorb gamma
- 5. gamma radiation is part of the electromagnetic...
- 10. radiation that is made up of fast electrons
- 11. a few mm of this metal will absorb beta
- 12. a helium nucleus has 2 protons and 2 .........
- 13. alpha radiation is the ....... ionising
- 15. the number of decays each second
- 16. radiation that is also called a helium nucleus
Down
- 1. gamma radiation is the .........ionising
- 3. radiation that travels at the speed of light
- 4. the unit of activity
- 6. each alpha particle has 2 positive ........
- 7. all radiation can kill or damage these
- 8. a few sheets of this material will absorb alpha
- 9. a prefix that means thousands
- 10. this type of radiation is around us always
- 13. a prefix that means millions
- 14. when an atom loses or gains electrons