Ionising radiation

12 questions

1. What part of an atom is identical to a beta-minus particle?
2. The nucleus of which atom is identical to an alpha particle?
3. How is a beta particle emitted from a radioactive atom?
4. What is the mass (nucleon) number of ^{240}_{94}Pu?
5. How many electons are in an atom of ^{231}_{90}Th?
6. How many neutrons are in the nucleus of an atom of ^{235}_{92}U?
7. Which particles are radioactive?
8. Why is a beta particle not radioactive?
9. How can alpha particles damage atoms they pass sufficiently close to?
10. Which of these is the thinnest barrier that can stop most beta particles?
11. Put these types of radiation in order of how ionising they are, starting with the most ionising.
12. Put these types of radiation in order of how penetrating they are, starting with the most penetrating.

License: OGL