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13 cards from this deck
A random process where unstable nuclei emit radiation to become more stable
Becquerel (Bq)
Number of decays recorded by a detector per second
A helium nucleus
Highly ionising
Weakly penetrating (~5cm of air)
Reduces by 4
Reduces by 2
An electron
Increases by 1
Stays the same
Low ionising
No change to charge or mass - removes excess energy
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