Nuclear Chemistry

4. Nuclear emission involving a high-speed electron or positron.
7. Process by which an unstable nucleus changes into a more stable one.
9. Atoms of the same element that differ in their number of neutrons.
13. Series of self-sustaining nuclear fission reactions triggered by released neutrons.
14. Likelihood that a nucleus will resist radioactive decay.
15. Describes an unstable nucleus that emits radiation spontaneously.

1. The dense center of an atom where nuclear reactions occur.
2. Time required for one-half of a radioactive sample to decay.
3. Process in which one element changes into another through a nuclear reaction.
5. Nuclear reaction in which small nuclei combine to form a larger nucleus.
6. Subatomic particle that can initiate many fission reactions.
8. Type of nuclear emission consisting of two protons and two neutrons.
10. Energy or particles emitted from unstable atomic nuclei.
11. High-energy electromagnetic radiation emitted from the nucleus.
12. Nuclear reaction in which a large nucleus splits into smaller nuclei.