The half-life of the nuclei of the radioactive isotope of bismuth is 19 minutes.
| August 2, 2021 | education
The half-life of the nuclei of the radioactive isotope of bismuth is 19 minutes. How long will it take for 75% of the bismuth nuclei in the test sample to decay?
The half-life of the nuclei of the radioactive isotope of bismuth is 19 minutes, knowing this, we will find after how long 75% of the bismuth nuclei will decay.
After the first half-life of 19 minutes, 50% of the bismuth nuclei will decay.
After a second half-life of 19 minutes, 25% of the bismuth nuclei have decayed.
75% of bismuth nuclei decayed in 2 half-lives or 38 minutes.
Answer: 38 minutes.
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