Radioactivity

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6 Terms

1
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activity

activity of a radioactive source is equal to the number of decays per second

2
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background radiation

is produced all the time in the background low ionising ability

3
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half life 

time taken for an isotope’s mass to decay by half

4
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irradiation

being exposed to radiation 

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ionisation

ability to strip an atom of its electron

6
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contamination

when an object becomes radioactive due to the presence of radiation