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Assuming that the global amount of radiocarbon is constant, decaying Carbon-14 is repeatedly restored in organisms while they are alive. However, when an organism dies, the amount of Carbon-14 begins to decrease as it decays to Nitrogen-14. A peat bed sample is found to have 6% of Carbon-14 remaining from a specific type of bivalve shells. How old is the peat bed?

Assuming that the global amount of radiocarbon is constant, decaying Carbon-14 is repeatedly restored in organisms while they are alive. However, when an organism dies, the amount of Carbon-14 begins to decrease as it decays to Nitrogen-14. A peat bed sample is found to have 6% of Carbon-14 remaining from a specific type of bivalve shells. How old is the peat bed?

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Assuming that the global amount of radiocarbon is constant, decaying Carbon-14 is repeatedly restored in organisms while they are alive. However, when an organism dies, the amount of Carbon-14 begins to decrease as it decays to Nitrogen-14.

A peat bed sample is found to have 6% of Carbon-14 remaining from a specific type of bivalve shells. How old is the peat bed?

SOME ISOTOPES USED FOR RADIOMETRIC DATING Half-lives (T,) Parent Isotope (P) Daughter Isotope (D) Materials Dated Newty formed crystal Uranium-238 Lead-206 4.5 billon years Zroon 100 713 milion years 1.3 billon years Uranium-235 Lead-207 Zroon Biotite, muscovite, whole volcanic rock 15.9% Potassium-40 Argon-40 decayed to daughter Carbon-14 Nitrogen-14 5730 years Shells, limestone, organic materials 84.1 29.3% decayed 70.7 Parent Atoms (P) 0000 RADIOACTIVE DECAY 50.0 50% decayed Daughter Atoms (D) 25.0 75% decayed 87.5% decayed 12.5 6.2 3.1 93.8% decayed 96.9% decayed 2 3 Half-lives (T) Elapsed DECAY PARAMETERS FOR ALL RADIOACTIVE DECAY PAIRS Percent of Parent Atoms (P) Percent of Daughter Atoms (D) Half-lives Elapsed Age 0.000 x T 0.015 x T 0.031 x T 0.062 x T 0.125 x T 0.250 x T 0.500 x T 1.000 х Тур 1.500 x T 2.000 x Ty, 3.000 х Ту 4.000 x T, 5.000 х Ту 100.0 0.0 98.9 1.1 1/64 97.9 2.1 1/32 95.8 4.2 1/16 91.7 83 1/8 84.1 15.9 1/4 70.7 29.3 1/2 50.0 50.0 35.4 64.6 25.0 75.0 12.5 87.5 6.2 93.8 4 3.1 96.9 5 FIGURE 16 Some isotopes useful for radiometric dating and their decay parameters. The half-life of each decay pair is different (top chart), but the graph and decay parameters (bottom charts) are the same for all decay pairs. Percent of Parent (P) Atoms Remaining
Transcribed Image Text:SOME ISOTOPES USED FOR RADIOMETRIC DATING Half-lives (T,) Parent Isotope (P) Daughter Isotope (D) Materials Dated Newty formed crystal Uranium-238 Lead-206 4.5 billon years Zroon 100 713 milion years 1.3 billon years Uranium-235 Lead-207 Zroon Biotite, muscovite, whole volcanic rock 15.9% Potassium-40 Argon-40 decayed to daughter Carbon-14 Nitrogen-14 5730 years Shells, limestone, organic materials 84.1 29.3% decayed 70.7 Parent Atoms (P) 0000 RADIOACTIVE DECAY 50.0 50% decayed Daughter Atoms (D) 25.0 75% decayed 87.5% decayed 12.5 6.2 3.1 93.8% decayed 96.9% decayed 2 3 Half-lives (T) Elapsed DECAY PARAMETERS FOR ALL RADIOACTIVE DECAY PAIRS Percent of Parent Atoms (P) Percent of Daughter Atoms (D) Half-lives Elapsed Age 0.000 x T 0.015 x T 0.031 x T 0.062 x T 0.125 x T 0.250 x T 0.500 x T 1.000 х Тур 1.500 x T 2.000 x Ty, 3.000 х Ту 4.000 x T, 5.000 х Ту 100.0 0.0 98.9 1.1 1/64 97.9 2.1 1/32 95.8 4.2 1/16 91.7 83 1/8 84.1 15.9 1/4 70.7 29.3 1/2 50.0 50.0 35.4 64.6 25.0 75.0 12.5 87.5 6.2 93.8 4 3.1 96.9 5 FIGURE 16 Some isotopes useful for radiometric dating and their decay parameters. The half-life of each decay pair is different (top chart), but the graph and decay parameters (bottom charts) are the same for all decay pairs. Percent of Parent (P) Atoms Remaining
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