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ch 18

Strong force attractive force that acts between protons and neutrons in an atomic nucleus
Radioactivity process that occurs when a nucleus decays and emits alpha, beta, or gamma radiation
Alpha particle particle consisting of two protons and two neutrons that is emitted from a decaying atomic nucleus
Transmutation process of changing one element to another through radioactive decay
Beta particle electron that is emitted from a decaying atomic nucleus
Gamma ray electromagnetic wave with no mass and no charge that travels at the speed of light and is usually emitted with alpha or beta particles from a decaying atomic nucleus
Half-life amount of time it take for half of the nuclei in a sample of a radioactive isotope to decay
Nuclear fission process of splitting an atomic nucleus into two or more nuclei with smaller masses
Chain reaction ongoing series of fission reactions
Critical mass amount of fissionable material required so that each fission reaction produces approximately one more fission reaction
Nuclear fusion reaction in which two or more atomic nuclei form a nucleus with a larger mass
Tracer radioactive isotope that can be detected by the radiaiton it emits after it is absorbed by a living organism
Created by: adajahhoran