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15 cards from this deck
Time for half the nuclei in a sample to decay
Time for activity or count rate to halve
Yes, it is constant
Less of a long-term risk
Very radioactive initially, quickly dies down
Weakly radioactive for a long period of time
432 years
Smoke alarms
Alpha emitter
Number of radiation counts per second
Rate at which a source decays (1 Bq=1 decay/second1 \text{ Bq} = 1 \text{ decay/second}1 Bq=1 decay/second)
Completely random process
Geiger-Muller tube and counter
No, never reaches zero
160 Bq160 \text{ Bq}160 Bq (25% of initial)
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