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A certain radioactive isotope placed near a Geiger counter registers 160 counts per second. 32 hours later, the counter registers 10 counts per second. What is the half-life of the isotope?
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A certain radioactive isotope placed near a Geiger counter registers 160 counts per second. 32 hours later, the counter registers 10 counts per second. What is the half-life of the isotope?

User Soktinpk
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1 Answer

3 votes
8 hours

160>80>40>20>10
Count how many arrows are there, 4 arrows, so
32/4=8
User Slim
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