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Create an account to get started Create Account. Radioisotope of carbon used in carbon dating Length of the half-life of carbon What you can determine about isotopes based upon half-life How many half-lives a radioactive isotope has before scientists consider it gone Items that cannot be dated using carbon dating Skills Practiced Information recall - access the knowledge you've gained regarding the radioisotope of carbon used in carbon dating Knowledge application - use your knowledge to answer questions about the characteristics of carbon dating and what it may be used to date Interpreting information - verify that you can read information on half-life related to carbon dating and interpret it correctly Additional Learning To learn more about this method of radiometric dating, review the accompanying lesson called What is Carbon Dating?
This lesson covers the following topics: Definition Radioactive half-lives Using Carbon for dating Relationship of photosynthesis to carbon dating. You are viewing lesson Lesson 6 in chapter 6 of the course:. Aspects of Our Solar The Universe Beyond Our Solar Like this lesson Share.
Browse Browse by subject. Enrolling in a course lets you earn progress by passing quizzes and exams. Take quizzes and exams. Earn certificates of completion. You will also be able to: Create a Goal Create custom courses Get your questions answered. Upgrade to Premium to add all these features to your account! A count sample is stored for How much radiation remains in the original sample? If a sample originally had atoms of carbon, how many atoms will remain after 16, years? If you had a gram sample of plutonium, how much would still remain in 43 years? If a sample of gas contains 4.
What is the fraction of a sample of carbon left after 22, years if its half life is 5, years? Suppose the half life of element K is 20 minutes. If you have g sample of K, how much of element K will be left after 60 minutes? What fraction of a given sample of a radioactive nuclide remains after four half-lives? The half-life of cobalt is 5.
Approximately how much of a g sample will remain after 20 years? Polonium has a relatively short half life of s. How many seconds would it take for 8. Iodine is a radioactive isotope with a half-life of 8 days. How many grams of a 64 g sample of iodine will remain at the end of 24 days? The half-life for the radioactive decay of calcium is 4. How many half-lives have elapsed after 18 days?
If we start with atoms of radium, how much would remain after 3, years? How much grams of a substance will be left after 2 hours if its half life is 15 minutes? If actinium has a half life of What is the half life of argon?
If g of Au decays to 6. If 50 g are left after How much of a g sample is left after The isotope chromium has a half-life of 28 days. If the original sample had a mass of A uranium sample starts with atoms, and million years later, there are atoms. What is the half-life of uranium? Sodium has a half-life of Suppose you had a sample containing 0. How many hours would be required to reduce your sample to 6. The half life of radon is 3. After what time will one fourth of a given amount of radon remain?
You are given grams of a substance with a half-life of 1. How much will remain after How old is a fossil that has radioactively decayed through 4 half-lives of carbon? The half-life is "2 hours". If a fossil is 23, years old and it has 3 Kg of Carbon, how much carbon did it originally have?
What does the 0. What is the half life formula? Find the time it would take for a sample of 0. What amount of plutonuim would be left after years if you initially have 14 kilo- grams? The half-life of plutonium is years. A radioactive substance has a half-life of years - if there were originally 80 radioactive milligrams 50 years ago, how much is still radioactive today? If you have mg of a drug with a half-life of 4 hours, how long will it take to totally eliminate it from the body?
The half-life for radioactive decay a first-order process of plutonium is 24, years. How many years would it take for one mole of this radioactive material to decay so that just one atom remains?
A sample of carbon has been decaying for 22, years and is now grams. What was the size of the original sample? (The half-life of carbon is 5, If a fossil sample originally contained 5 grams of carbon and the half-life of carbon is 5, years. After 11, years how many grams of carbon would.
The mass of cobalt in a sample is found to have decreased from 0. From this information, what is the half-life of cobalt? Carbon has a half life of years. The water is used to make wine and whisky. Given that the half - life of tritium is What percentage of strontium remains in a sample after two first-order half-lives have passed? How much Cu half-life about 12 hours would remain from a 2 mg sample after 12 hours?
How long would it take for fifteen-sixteenths of a sample of radon to decay? Carbon has a half-life of 5, years. How long will it take for The half-life of a certain substance is 3. How long will it take for 20 g of the substance to decay to 7 g? If we start with 1 mg of strontium, 0.
What is the half life of strontium? The half-life of bromine is 25 min. How much of a 6. Krypton has a half-life of 35 h. How many half-lives have passed after 2 days? What is the half-life of a first-order reaction with a rate constant of 7. What is the half-life when the initial concentration is 0.
A sample of U initially contained 1. The half life of bromine is 20 min. How much 10 mg sample is still active after 60 min? A radioisotope has a five-year half life. After a given amount decays for 25 years, what fraction of the original isotope is left? A sample of a radioactive isotope is found to have lost What is the decay constant of this isotope? A sample of rock is found to contain grams ion a parent isotope. How many grams of the parent isotope will remain after two half lives? The half-life of Iodine is approximately 8 days. What is the amount of Iodine left from a 35 gram sample after 32 days?
Mercury is used for kidney scans and has a half-life of 3 days.
If the 32 grams of mercury is ordered, but takes 15 days to arrive, how much would arrive in the shipment? Technetium 99 is used for brain scans. If a laboratory receives a shipment of g of this isotope, how much will remain after 24 hours?
The half life of Technetium 99 is 6 hours. If a laboratory receives a shipment of g of this isotope, how much will remain after 15 hours? Uranium has a half-life of million years. How long does it take a gram sample of Uranium to decay to a mass of 50 grams? The half-life of cesium is If the initial mass of a sample of cesium is 1.
A bone was found to be approximately years old. The current amount of carbon in the bone was 5. How many atoms must the bone have had originaly, assuming that the half-life of carbon is approximately years?