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12 cards from this deck
Time for half of unstable nuclei in a sample to decay
Becquerel (Bq)
One decay per second
Decreases by half
No, it's a random process
Yes, we can predict group behaviour
Reduced by half
600÷2=300600 \div 2 = 300600÷2=300 Bq
300÷2=150300 \div 2 = 150300÷2=150 Bq
Divide total time by half-life period
Find time for count to halve from initial value
2,500 nuclei
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