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12 Cards in this Set
- Front
- Back
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nuclear radiation
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high-energy particles and rays that are emitted by the nuclei of some atoms; alpha particles, beta particles and gamma rays are types of nuclear radiaton
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radioactivity
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the ability of some elements to give off nuclear radiation
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radioactive decay
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the process in which the nucleus of a radioactive atom releases nuclear radiation
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alpha decay
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the release of an alpha particle from a nucleus
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mass number
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the sum of the protons and neutrons in an atom
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beta decay
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the release of a beta particle from a nucleus
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isotopes
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atoms that have the same number of protons but have different numbers of neutrons
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gamma decay
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the release of gamma rays from a nucleus
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half-life
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the amount of time it takes for one-half the nuclei of a radioactive isotope to decay
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nuclear fission
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the process in which a large nucleus splits into two smaller nuclei; during this process, matter is converted into energy
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nuclear chain reaction
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a continusous series of nuclear fission reactions
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nuclear fusion
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the process in which two or more nuclei with small masses joing together, or fuse, to form a larger more massisve nucleus; during this process, matter is converted into energy
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