| Term | Definition |
|---|
| ALPHA PARTICLE | a positively charged atomic particle that is much more massive than either a beta particle or gamma radiation and its relatively slow moving; has same combination of particles as the nucleus of a helium atoms |
| BETA PARTICLE | a high speed electron; emitted by a radioactive nucleus in beta decay |
| FISSION | a nuclear reaction in which a large nucleus breaks apart, producing two or more smaller nuclei, subatomic particles, and energy |
| FUSION | a proccess in which two low mass nuclei join together to make a more massive nucleus |
| GAMMA RADIATION | rays of high-energy, short wavelength radiation emitted from the nuclei of atoms |
| HALF-LIFE | in biology, the time it takes for a living tissue, organ, organism, or ecosystem to eliminate one half of a substance that has been introduced into it (2.3) in physics, the time required for half of the nuclei in a sample of radioactive isotope to decay, which is constant for any radioactive isotope |
| ISOTOPES | different atoms of a particulator element that have the same number of protons but a different number of neutrons |
| LIGHT | one form of radiation that is visible to humans |
| RADIOACTIVE DECAY | the process in which the nuclei of radioactive parent isotopes emit alpha, beta, or gamma radiation to form decay products |
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