In the process of radiometric dating, if the percent of the original amount of carbon-14 present in a fossil is 12.5%, how old is the fossil? The half-life of carbon-14 is 5,730 years.Multiple choice question.11,460 years old17,190 years old5,700 years old22,920 years old
Question
In the process of radiometric dating, if the percent of the original amount of carbon-14 present in a fossil is 12.5%, how old is the fossil? The half-life of carbon-14 is 5,730 years.Multiple choice question.11,460 years old17,190 years old5,700 years old22,920 years old
Solution
Radiometric dating is based on the concept of half-life, which is the time it takes for half of a radioactive substance to decay. In this case, the half-life of carbon-14 is 5,730 years.
- After one half-life (5,730 years), 50% of the original carbon-14 would remain.
- After two half-lives (11,460 years), 25% of the original carbon-14 would remain.
- After three half-lives (17,190 years), 12.5% of the original carbon-14 would remain.
So, if the fossil has 12.5% of the original carbon-14, it is 17,190 years old. Therefore, the correct answer is "17,190 years old".
Similar Questions
The half life for the radioactive decay of carbon-14 to nitrogen-14 is ×5.73103 years.Suppose nuclear chemical analysis shows that there is 0.414mmol of nitrogen-14 for every 1.000mmol of carbon-14 in a certain sample of rock. Calculate the age of the rock.Round your answer to 2 significant digits.
The half-life of carbon 14 is 5,730 years. Approximately, how old is a bone that has 70% of its original carbon 14?Question 3Select one:a.7,500 yearsb.7,000 yearsc.6,500 yearsd.6,000 yearse.Less than 6,000 years
The carbon-14 in the fossil had five half-lives. The fossil was between 18,000 and 21,000 years old.The amount of carbon-14 in the fossil decreased over time.The fossil was older than other fossils found in the same area
Carbon-14 is a radioactive nucleus with a half-life of 5760 years. In livingmatter the amount of carbon-14 decays at a rate of 15.3 decay events perminute per gram of carbon. A fossil is analysed and found to have a carbon-14 decay rate of 7.70 decay events per minute per gram of carbon. How oldis the fossil?
If a fossil was found that had 50% radioactive carbon-14 and 50% decayed element, approximately how old is the fossil?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.