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physical science

vocab ch. 16

QuestionAnswer
Radioactive the process by which an unstable nucleus gives off nuclear radiation.
Mass number the sum of the numbers of protons and neutrons in the nucleus of an atom.
Isotope atoms that has the same number of protons as other atoms of the same element do but that have differen numbers of neutrons
Half-life the time needed for half of a sample of a radioactive substance to undergo radioactive decay.
Nuclear fission the process by which a large nucleus splits into two small nuclei and releases energy.
Nuclear chain reaction a continuous series of nuclear fission reactions.
Nuclear fusion the combination of the nuclei of small atoms to form a larger nucleus; releases energy.
Created by: ablasiman
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