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7 Cards in this Set
- Front
- Back
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Radioactivity
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The process by which an unstable nucleus gives off nuclear radiation
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Mass Number
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The sum of the numbers of protons and neutrons in the nucleus of an atom
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Isotope
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An atom that has the same number of protons (or the same atomic number) as other atoms of the same element do but that has a different number of neutrons (and thus a different atomic mass)
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Half-Life
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The time needed for half of a sample of a radioactive substance to undergo radioactive decay
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Nuclear Fission
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The splitting of the nucleus of a large atom into two or more fragments; releases additional neutrons and energy
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Nuclear Chain Reaction
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A continuous series of nuclear fission reactions
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Nuclear Fusion
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The combination of the nuclei of small atoms to form a larger nucleus; releases energy
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