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15 cards from this deck
Random process where unstable nuclei emit radiation to become more stable
Becquerel (Bq)
Decays recorded by detector per second
Helium nucleus (2 protons, 2 neutrons)
Highly ionising
Weakly penetrating (~5cm of air)
Decreases by 4
Decreases by 2
Electron
Medium ionising
Stays the same
Increases by 1
Low ionising
Highly penetrating (few cm of lead)
No change; releases excess energy
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