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djyliett [7]
4 years ago
8

A radioactive material has a count rate of 1600 counts per minute. It has a half life of 20 minutes. How long will it take to de

cay to a rate of 100 counts per minute?
Chemistry
1 answer:
Natalka [10]4 years ago
8 0
80 minutes because:

1600 -> 20mins -> 800

800 -> 20 mins -> 400

400 -> 20 mins -> 200

200 -> 20 mins -> 100

4*20 mins = 80 minutes
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