An Introduction to Physical Science
An Introduction to Physical Science
14th Edition
ISBN: 9781305079137
Author: James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher: Cengage Learning
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Chapter 24, Problem 10MC
To determine

The radioactive element that gradually decays to lead and can be used to date ancient rocks.

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You are dating rocks by their proportions of parent isotope potassium-40(half life 1.25 billion years) and daughter isotope argon-40. Find the age for a rock that contains 3 times as much Argon-40 as potassium 40.               Needs Complete solution with 100 % accuracy.
SOME ISOTOPES USED FOR RADIOMETRIC DATING Daughter Isotope (D) Half-Lives (T½) Useful Dating Range Parent Isotope (P) Materials Dated Newly formed crystal Uranium-238 4.5 billion years Zircon 713 million years Zircon Lead-206 ages > 10 m.y. 100 Uranium-235 Lead-207 ages > 10 m.y. 0000000o o00000 15.9% decayed to daughter Potassium-40 Argon-40 Biotite, muscovite, whole volcanic rock 1.3 billion years ages > 50,000 yr Shells, limestone, organic materials ages 100-60,000 yr Carbon-14 Nitrogen-14 5730 years 84.1 29.3% decayed 70.7 Parent Atoms (P) 000000000e 50% decayed RADIOACTIVE DECAY 50.0 Daughter Atoms (D) 25.0 75% decayed 87.5% decayed 12.5 93.8% decayed 96.9% decayed 6.2 3.1 14 2 3 4 5 6 Half-Lives (T1) 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 Ty 0.062 x Ty 0.125 x T 0.250 x T 0.500 x T2 1.000 x Ty2 100.0 0.0 98.9 1.1 1/64 97.9 2.1 1/32 95.8 4.2 1/16 91.7 8.3…
Uranium-lead (U-Pb) dating of geological samples is one of the oldest and most refined radiometric dating methods, able to determine ages of about 1 million years to over 4.5 billion years with precision in the 0.1–1% range. The U-Pb dating method relies on two separate decay chains, one of which is the actinium series from 235U to 207Pb, with a half-life of 704 million years.   Geologists unearth a sample of zircon that appears to be a closed system. They find 0.714  grams of 207Pb for 1.000 grams of 235U present. Approximately how old is the sample? _______ yrs

Chapter 24 Solutions

An Introduction to Physical Science

Ch. 24.4 - Prob. 2PQCh. 24.5 - Prob. 1PQCh. 24.5 - Prob. 2PQCh. 24.5 - Prob. 24.4CECh. 24 - KEY TERMS 1. geologic time (Intro) 2. fossil...Ch. 24 - KEY TERMS 1. geologic time (Intro) 2. fossil...Ch. 24 - Prob. CMCh. 24 - Prob. DMCh. 24 - Prob. EMCh. 24 - Prob. FMCh. 24 - Prob. GMCh. 24 - Prob. HMCh. 24 - Prob. IMCh. 24 - Prob. JMCh. 24 - Prob. KMCh. 24 - Prob. LMCh. 24 - Prob. MMCh. 24 - Prob. NMCh. 24 - Prob. OMCh. 24 - Prob. PMCh. 24 - Prob. QMCh. 24 - Prob. RMCh. 24 - Prob. SMCh. 24 - Prob. TMCh. 24 - Prob. UMCh. 24 - Prob. VMCh. 24 - Prob. WMCh. 24 - Prob. XMCh. 24 - Prob. ZMCh. 24 - Prob. 1MCCh. 24 - Prob. 2MCCh. 24 - Prob. 3MCCh. 24 - What is the name for the type of fossil formed...Ch. 24 - Prob. 5MCCh. 24 - What is obtained when rocks and geologic events...Ch. 24 - Prob. 7MCCh. 24 - Prob. 8MCCh. 24 - Prob. 9MCCh. 24 - Prob. 10MCCh. 24 - If the half-life of a radioactive specimen is 100...Ch. 24 - Prob. 12MCCh. 24 - Prob. 13MCCh. 24 - Prob. 14MCCh. 24 - Prob. 15MCCh. 24 - Prob. 16MCCh. 24 - Prob. 17MCCh. 24 - Prob. 18MCCh. 24 - Prob. 19MCCh. 24 - Prob. 20MCCh. 24 - Prob. 1FIBCh. 24 - Prob. 2FIBCh. 24 - Prob. 3FIBCh. 24 - Prob. 4FIBCh. 24 - Prob. 5FIBCh. 24 - Prob. 6FIBCh. 24 - Prob. 7FIBCh. 24 - Prob. 8FIBCh. 24 - Prob. 9FIBCh. 24 - Prob. 10FIBCh. 24 - Prob. 11FIBCh. 24 - Prob. 12FIBCh. 24 - Prob. 13FIBCh. 24 - Prob. 14FIBCh. 24 - Prob. 15FIBCh. 24 - Prob. 16FIBCh. 24 - Prob. 17FIBCh. 24 - Prob. 18FIBCh. 24 - Prob. 19FIBCh. 24 - Prob. 20FIBCh. 24 - What is meant by the phrase geologic time?Ch. 24 - Why are so few fossils of worms found?Ch. 24 - Prob. 3SACh. 24 - Prob. 4SACh. 24 - Prob. 5SACh. 24 - Prob. 6SACh. 24 - Prob. 7SACh. 24 - Prob. 8SACh. 24 - How do fossils aid in oil exploration?Ch. 24 - Prob. 10SACh. 24 - How might the principle of superposition be...Ch. 24 - Prob. 12SACh. 24 - Prob. 13SACh. 24 - Prob. 14SACh. 24 - Prob. 15SACh. 24 - Prob. 16SACh. 24 - What four features characterize the best index...Ch. 24 - Prob. 18SACh. 24 - Prob. 19SACh. 24 - Prob. 20SACh. 24 - Prob. 21SACh. 24 - Prob. 22SACh. 24 - Prob. 23SACh. 24 - Prob. 24SACh. 24 - Prob. 25SACh. 24 - Prob. 26SACh. 24 - Carbon-14 dating measures the ratio of carbon-14...Ch. 24 - What are the three conditions for using an isotope...Ch. 24 - Distinguish between primordial lead and radiogenic...Ch. 24 - Prob. 30SACh. 24 - Prob. 31SACh. 24 - Prob. 32SACh. 24 - Prob. 33SACh. 24 - Prob. 34SACh. 24 - Prob. 35SACh. 24 - Prob. 36SACh. 24 - Prob. 37SACh. 24 - Prob. 38SACh. 24 - What biologic event is used by geologists to...Ch. 24 - What is the biological event that started the...Ch. 24 - Prob. 41SACh. 24 - Prob. 42SACh. 24 - Prob. 43SACh. 24 - In what period and era were the great coal-forming...Ch. 24 - About how many days on the geologic time calendar...Ch. 24 - Prob. 1VCCh. 24 - What are the strengths and weaknesses of the...Ch. 24 - Prob. 2AYKCh. 24 - Prob. 3AYKCh. 24 - Prob. 4AYKCh. 24 - Prob. 5AYKCh. 24 - Prob. 1ECh. 24 - Prob. 2ECh. 24 - Figure 24.21 Relative Dating See Exercises 3 and...Ch. 24 - Figure 24.21 Relative Dating See Exercises 3 and...Ch. 24 - Metamorphic rock shows that only 25% of its...Ch. 24 - Prob. 6ECh. 24 - Prob. 7ECh. 24 - Suppose that one species of index fossil lived...
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