Radioactive Parent Stable Daughter Product Half-life Potassium-40 Argon-40 1.25 billion yrs Rubidium-87 Strontium-87 48.8 billion yrs Thorium-232 Lead-208 14.1 billion yrs Uranium-235 Lead-207 713 million yrs Uranium-238 Lead-206 4.47 billion yrs Carbon-14 Nitrogen-14 5730 yrs 1. How many half-lives have elapsed to yield a sample with 125 atoms of C-14 and 375 atoms of N-14? 2. If the U-235:Pb-207 ratio in a zircon in a sandstone was found to be 1:3, how old is the zircon? 3. If the K-40:Ar-40 ratio in a zircon in a granite was found to be 1:7, how old is the sample?
Radioactive Parent Stable Daughter Product Half-life Potassium-40 Argon-40 1.25 billion yrs Rubidium-87 Strontium-87 48.8 billion yrs Thorium-232 Lead-208 14.1 billion yrs Uranium-235 Lead-207 713 million yrs Uranium-238 Lead-206 4.47 billion yrs Carbon-14 Nitrogen-14 5730 yrs 1. How many half-lives have elapsed to yield a sample with 125 atoms of C-14 and 375 atoms of N-14? 2. If the U-235:Pb-207 ratio in a zircon in a sandstone was found to be 1:3, how old is the zircon? 3. If the K-40:Ar-40 ratio in a zircon in a granite was found to be 1:7, how old is the sample?
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...
Related questions
Question
|
Radioactive Parent |
Stable Daughter Product |
Half-life |
|
Potassium-40 |
Argon-40 |
1.25 billion yrs |
|
Rubidium-87 |
Strontium-87 |
48.8 billion yrs |
|
Thorium-232 |
Lead-208 |
14.1 billion yrs |
|
Uranium-235 |
Lead-207 |
713 million yrs |
|
Uranium-238 |
Lead-206 |
4.47 billion yrs |
|
Carbon-14 |
Nitrogen-14 |
5730 yrs |
1. How many half-lives have elapsed to yield a sample with 125 atoms of C-14 and 375 atoms of N-14?
2. If the U-235:Pb-207 ratio in a zircon in a sandstone was found to be 1:3, how old is the zircon?
3. If the K-40:Ar-40 ratio in a zircon in a granite was found to be 1:7, how old is the sample?
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