Chapter 21

2. change the identity of a nucleus
3. reaction that affects the nucleus of an atom
4. low mass nuclei combine to form a heavier, more stable nucleus
6. exposure of film to measure the approximate radiation
8. number nucleons that represent completed nuclear energy levels
9. the nuclides produced by the decay of the parent nuclide
11. instruments that detect radiation
13. inner orbital electron is capture by nucleus of its own atom
14. radiation absorbing material that is used to decrease exposure to radiation
15. a unit to measure nucleus radiation exposure

1. used to slow down the fast neutrons produce by fission
2. any elements with more than 92 protons in their nuclei
5. use energy as heat from nuclear reactors to produce electrical energy
7. high energy wave
10. neutron absorbing rods that help control the reaction by limiting the number of free electrons
12. the heaviest nuclide of each decay series