Half-life
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10 Terms
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Radioactive substances
________ give out radiation from the nuclei of their atoms- no matter what.
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Half life
________ can be used to find the rate at which a source decays- its ACTIVITY.
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short half life
A(n) ________ means the activity falls quickly, because the nuclei are very unstable and rapidly decay.
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Radioactivity
________ is a totally random process.
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radioactivity of a source
The ________ decreases over time.
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graph
you can measure half life using a__
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number of radioactive nuclei
half-life is the time taken for the___________in an isotope to halve
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rate of source decay
half-life is used to find the__________
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random
radioactive decay is entirely________
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more slowly
long half-life means activity falls____
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