Concept explainers
The amount of carbon-14 left after 17,190 years.
Answer to Problem 13STP
In a sample of 80 g of carbon-14, about 10 g of carbon-14 will be left after 17,190 years.
Explanation of Solution
Give info:
Amount of carbon-14 initially
Total number of years
Half-life of isotopes
Formula used:
Calculation:
After each half-life the number of remaining undecayed nuclei decrease rapidly.
- After one half-life the number of remaining undecayed nuclei reduced to half.
- And after two half-lives the number of remaining undecayed nuclei reduced to one-fourth.
- And after 3 half-lives the number of remaining undecayed nuclei reduced to one-eighth that means out of 80 g only 10 g of carbon-14 remained.
Conclusion:
Thus,the amount of carbon-14 will left after 17,190 years if initially there is a sample of 80 g of carbon-14.
Chapter 20 Solutions
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
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