For samples 1, 2 and 3: A. determine the D/P ratio in the table below (calculate each value to 1 decimal place). B. If thedecay constant (A) for the radioactive decay of 40K is A = 5.543 x 10-10 year -1 and half-life 1.248 billion years, determine theage of the samples in billion years (calculate each value to 2 decimal places). C. Using the half-life, complete the Half-.(lives Elapsed column in the table (calculate each value to 1 decimal placeHalf-lives elapsedAge in billion yearsD/P RatioDaughter Parent Sample10000500010000250075001250Please answer all parts of the questionBecause 14C has a very short half-life, the 14C method is useful in dating organic material only as old as about 70,000 years.Laboratory work established a relationship between the "specific activity" of an organic substance and its age. Specificactivity is a measure of the amount of remaining 14C, expressed as pmc (percentage of modern carbon). The 14C age is:calculated asa, 14ct =-8267 In(where at 14C is the measured 14C activity and a, 14C is the initial activity (- 100 pmc). If the 14C activity in a sample Xis measured to be 68 pmc, how old is the sample? Age =yearsالجواب

As per rule, only the first question can be answered. Decay constant (λ) = 5.543 x 10-10 year-1 1…

For samples 1, 2 and 3: A. determine the D/P ratio in the table below (calculate each value to 1 decimal place). B. If the decay constant (A) for the radioactive decay of 40K is A = 5.543 x 10-10 year 1 and half-life 1.248 billion years, determine the age of the samples in billion years (calculate each value to 2 decimal places). C. Using the half-life, complete the Half- .(lives Elapsed column in the table (calculate each value to 1 decimal place Half-lives elapsed Age in billion years D/P Ratio Daughter Parent Sample 10000 5000 10000 2500 7500 1250 3

For samples 1, 2 and 3: A. determine the D/P ratio in the table below (calculate each value to 1 decimal place). B. If the decay constant (A) for the radioactive decay of 40K is A = 5.543 x 10-10 year 1 and half-life 1.248 billion years, determine the age of the samples in billion years (calculate each value to 2 decimal places). C. Using the half-life, complete the Half- .(lives Elapsed column in the table (calculate each value to 1 decimal place Half-lives elapsed Age in billion years D/P Ratio Daughter Parent Sample 10000 5000 10000 2500 7500 1250 3

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

A radioactive parent isotope with 600 atoms. After the decay, 450 daughter atoms were produced. Calculate the age of the rock if you know that the half-life of the parent isotope is 15 million years .
The radioactive decay of Cs-137 is displayed in the plot below. 100 90 80 70 60 50 40 30 20 10 Time (in Years) a. What is the half-life of this radioisotope in years? b. An ancient lab purchased and stocked 176 g of Cs-137, how many grams were left after 120 years? c. What percent of the original sample is left after 60 years? NOTE: Do not include units in your answer. Amount 09 06 120 + osi 빠 081 210 - 240
12. In the equation X Ra +He, the symbol X Tర్రాతయీ A. Th B. Th C. Rn D. Rn An 80 milligram sample of a radioactive isotope decays to 5 milligrams in 32 days What is the half-life of this element? 13. A. 8 days B. 2 days C. 16 days D. 4 days
2. A wooden object from an archeological site is subjected to radiocarbon dating. The activity of the sample that is due to ¹4C is measured to be 11.6 disintegrations per second. The activity of a carbon sample of equal mass from fresh wood is 15.2 disintegrations per second. The half-life of 14C is 5715 yr. What is the age of the archeological sample? Select Editing
||| Understanding radioactive half life sample A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 19.00 umol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/4 of the initial amount. A B C D Explanation symbol 33 15 188 75 127 54 227 89 radionuclide P Re Xe Ac Check half-life 25. days 17. hours 36. days 22. years initial radioactivity (choose one) B (choose one) (choose one) O (choose one) e time for amount of radionuclide to decrease to 1/4 of initial amount X days hours days years S MacBook Pro 0/3 Kimberly V ( Ⓒ2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility ?圖□ 圆图 olo Ar
E NUCLEAR CHEMISTRY Understanding radioactive half life A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 10.00 umol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/4 of the initial amount. sample A 10 B U D symbol 52 25 75 35 103 46 188 radionuclide 74 Ma Br Pd W half-life 6.0 days 98.0 minutes 17. days 69.0 days initial radioactivity (choose one) B (choose one) B (choose one) (choose one) time for amount of radionuclide to decrease to 1/4 of initial amount days minutes days 0/5 days
Q7. A 150 grams of a radioactive gas is accumulated in a container. After 3 months, only 141 grams of the gas remains. What is the monthly rate of decay for this gas? What is the half-life of this gas in year?
Calculate how long will it take for a sample of a radionuclide with a half-life of 39.9 days decay to 1.0% of its original value. a. 133 days b. 265 days c. 399 days d. 0.58 days
Flag for follow-up Christopher drew a graph to show changes in the mass of Bismuth during 25 days of radioactive decay. Based on the results below, what is the half-life of Bismuth in days? Radioactive Decay 100 100 80 60 40. 12.5 20- 6.25 3.125 10 15 20 25 Time (days) O A. Half of the 100 g sample is not radioactive anymore after 5 days. O B. Half of the 100 g sample is not radioactive anymore after 10 days. O C. Half of the 100 g sample is not radioactive anymore after 15 days. O D. Half of the 100 g sample is not radioactive anymore after 20 days. DELL Mass Blomuth (g)
Cancer therapy with radioactive rhenium-188 shows promise in patients suffering from colorectal cancer. a. Write the symbol for rhenium-188 and determine the number of neutrons, protons, and electrons. b. The half-life of rhenium-188 is 17 hours. If it takes 30 minutes to bind the isotope to an antibodythat delivers the rhenium to the tumor, what percentage of the rhenium remains after binding tothe antibody?
8. Thoron has a high average annual radiation dose according to the graph. It is a heavy radioisotope formed from the decay of thorium emitting an alpha particle. Thoron has a half-life of less than a minute. Would thoron be good to use in the medical field? Why or why not? Continue to the next slide ... ASUS % & 5 6 7 8. 9 ty i