EBK FUNDAMENTALS OF GENERAL, ORGANIC, A
8th Edition
ISBN: 8220102895805
Author: Peterson
Publisher: PEARSON
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Textbook Question
Chapter 11.5, Problem 11.8P
The half-life of carbon-14, an isotope used in archaeological dating, is 5730 years. What percentage of
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One problem in radiocarbon dating of biological samples, especially very old ones, is that they can easily be contaminated with modern biological material during the measurement process. What effect would such contamination have on the estimated age? Why is such contamination a more serious problem for samples of older material than for samples of younger material?
Suppose a scientist finds a rock with an interesting fossil. Curious to know the age of the fossil, she takes the rock to a lab. The
lab determines the amount of rubidium (Rb) and strontium (Sr) in the rock. The scientist is familiar with radiometric dating and
knows that she can now calculate the age of the rock, 1, using an isochron. The Rb-Sr isochron equation is
87.
Rb.
[edr – 1]
86
°Sr.
87
87
Sro
86
Sro
86
Sr.
87.
Rb
3.807 and
89.60. In a published table, she finds that
Using the lab's values, she calculates the isotope ratios as
86
Sr.
87
= 0.7129. She also finds that the decay constant,
86
the ratio of strontium-87 to strontium-86 at the formation of the rock was
Sro
2, for rubidium-87 is 1.42 x 10-11.
Use the equation and provided data to calculate t. Put your answer in scientific notation and round to the nearest tenth.
years
x10
What is the approximate age of the rock in billions of years? Round to the nearest tenth.
billions of years
t =
Which parent isotope is most useful for dating samples that are greater than 100 million years old?
a
potassium-40
b
lead-206
c
argon-40
d
uranium-238
Chapter 11 Solutions
EBK FUNDAMENTALS OF GENERAL, ORGANIC, A
Ch. 11.4 - Prob. 11.1PCh. 11.4 - Prob. 11.2PCh. 11.4 - Prob. 11.3PCh. 11.4 - Prob. 11.4PCh. 11.4 - Prob. 11.5PCh. 11.4 - Prob. 11.6PCh. 11.4 - Prob. 11.7KCPCh. 11.5 - What are the three main classes of techniques used...Ch. 11.5 - Prob. 11.2CIAPCh. 11.5 - The half-life of carbon-14, an isotope used in...
Ch. 11.5 - Prob. 11.9PCh. 11.5 - Prob. 11.10PCh. 11.5 - Prob. 11.11KCPCh. 11.6 - A -emitting radiation source gives 250 units of...Ch. 11.7 - What is the purpose of food irradiation, and how...Ch. 11.7 - What kind of radiation is used to treat food?Ch. 11.7 - A typical food irradiation application for the...Ch. 11.7 - A solution of selenium-75, a radioisotope used in...Ch. 11.7 - A typical chest X ray exposes a patient to an...Ch. 11.8 - Prob. 11.6CIAPCh. 11.8 - What advantages does MRI have over CT and PET...Ch. 11.8 - Prob. 11.8CIAPCh. 11.8 - Prob. 11.15PCh. 11.8 - The element berkelium, first prepared at the...Ch. 11.8 - Write a balanced nuclear equation for the reaction...Ch. 11.9 - What other isotope besides tellurium-137 is...Ch. 11.9 - Prob. 11.19PCh. 11.9 - One of the possible reactions for nuclear fusion...Ch. 11 - Magnesium-28 decays by emission to give...Ch. 11 - Prob. 11.22UKCCh. 11 - Prob. 11.23UKCCh. 11 - Prob. 11.24UKCCh. 11 - Prob. 11.25UKCCh. 11 - Prob. 11.26UKCCh. 11 - Prob. 11.27UKCCh. 11 - Prob. 11.28UKCCh. 11 - Prob. 11.29UKCCh. 11 - Prob. 11.30APCh. 11 - Describe how radiation, radiation, radiation,...Ch. 11 - Prob. 11.32APCh. 11 - Prob. 11.33APCh. 11 - Prob. 11.34APCh. 11 - Prob. 11.35APCh. 11 - Prob. 11.36APCh. 11 - Prob. 11.37APCh. 11 - Prob. 11.38APCh. 11 - Prob. 11.39APCh. 11 - Prob. 11.40APCh. 11 - Prob. 11.41APCh. 11 - Prob. 11.42APCh. 11 - What characteristic of uranium-235 fission causes...Ch. 11 - What products result from radioactive decay of the...Ch. 11 - Prob. 11.45APCh. 11 - Prob. 11.46APCh. 11 - Prob. 11.47APCh. 11 - Balance the following equations for the nuclear...Ch. 11 - Complete the following nuclear equations and...Ch. 11 - Prob. 11.50APCh. 11 - Cobalt-60 (half-life = 5.3 years) is used to...Ch. 11 - Prob. 11.52APCh. 11 - Prob. 11.53APCh. 11 - Prob. 11.54APCh. 11 - Prob. 11.55APCh. 11 - Selenium-75, a emitter with a half-life of 120...Ch. 11 - Prob. 11.57APCh. 11 - The half-life of mercury-197 is 64.1 hours. If a...Ch. 11 - Gold-198, a emitter used to treat leukemia, has a...Ch. 11 - Describe how a Geiger counter works.Ch. 11 - Prob. 11.61APCh. 11 - Prob. 11.62APCh. 11 - Prob. 11.63APCh. 11 - Prob. 11.64APCh. 11 - Match each unit in the left column with the...Ch. 11 - Prob. 11.66APCh. 11 - Sodium-24 is used to study the circulatory system...Ch. 11 - Prob. 11.68APCh. 11 - Prob. 11.69APCh. 11 - Prob. 11.70CPCh. 11 - Prob. 11.71CPCh. 11 - Prob. 11.72CPCh. 11 - Prob. 11.73CPCh. 11 - Prob. 11.74CPCh. 11 - Prob. 11.75CPCh. 11 - Prob. 11.76CPCh. 11 - Prob. 11.77CPCh. 11 - Prob. 11.78CPCh. 11 - Prob. 11.79CPCh. 11 - Prob. 11.80CPCh. 11 - Prob. 11.81CPCh. 11 - Prob. 11.82CPCh. 11 - Although turning lead into gold in a nuclear...Ch. 11 - Prob. 11.84CPCh. 11 - Prob. 11.85CPCh. 11 - Prob. 11.86CPCh. 11 - Prob. 11.87CPCh. 11 - Prob. 11.88CPCh. 11 - One way to demonstrate the dose factor of ionizing...Ch. 11 - One approach for treating cancerous tumors is...Ch. 11 - Prob. 11.91GP
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