Nuclear Chemistry

3. a reactor able to produce more fuel than it uses
5. a very fast moving electron that has been emitted from a neutron of an unstable nucleus
6. a sample that is massive enough to sustain a chain reaction
7. mass greater than critical mass
9. the combining of atomic nuclei
10. atoms which produce scintillations
11. high energy electromagnetic radiation
12. protons and neutrons
17. same composition of a helium nucleus
18. the difference in mass between a nucleus and its component nuclei
19. the location of stable nuclei on a graph
20. invisible rays emitted when electrons bombard the surface of certain materials

1. the splitting of a nucleus into fragments
2. the rays and particles emitted by a radioactive source
4. isotopes of atoms with unstable nuclei
8. Another name for a fusion reaction
13. Not massive enough to sustain a chain reaction
14. the time required for one half of a radioisotope's nuclei to decay
15. the conversion of an atom of one element to an atom of another
16. a radioisotope which emits non ionizing radiation and is used to signal the presence of an element