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A radioactive isotope of potassium (K) has a half-life of 20 minutes. If a 40.0 gram sample of this isotope is allowed to decay for 80 minutes, how many grams of the radioactive isotope will remain?
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A radioactive isotope of potassium (K) has a half-life of 20 minutes. If a 40.0 gram sample of this isotope is allowed to decay for 80 minutes, how many grams of the radioactive isotope will remain?

User Yogesh Wadhwa
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2 Answers

4 votes

Answer:

A

Step-by-step explanation:

A

User Giulio Roggero
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6.0k points
2 votes

Answer: 2.5 grams

Step-by-step explanation:

User James Sun
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