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1
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a particle of matter with the same mass as an electron, but opposite charge
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2
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the time required for the number of nuclides to react half of their original value
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3
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a substance that is used in nuclear reactors to slow down neutrons so that the nuclear fuel can capture them more efficiently
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4
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radioactive nuclides that can be introduced into organisms whose pathways can be traced by monitoring their radioactivity
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5
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a number of nuclides that decay over a period of time
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6
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the change of one element into another
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9
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an electron that is ejected from the nucleus during radioactive decay
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11
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a fission process that runs out of control and causes a violent explosion
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19
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a process use to establish an age for ancient artifacts
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20
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the nuclear device dropped on Nagasaki
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21
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the nuclear device dropped by the Enola Gay
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22
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neutral particle found in the nucleus of an atom
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