3. Natural thorium consists entirely of the alpha-radioactive isotopes 232Th which has a half-life of 1.4 × 1010 y. If a rock sample known to have solidified 3.5 billion years ago contains 0.1 percent of 232Th today, what was the percentage of this nuclide it contained when the rock solidified?

3. Natural thorium consists entirely of the alpha-radioactive isotopes 232Th which has a half-life of 1.4 × 1010 y. If a rock sample known to have solidified 3.5 billion years ago contains 0.1 percent of 232Th today, what was the percentage of this nuclide it contained when the rock solidified?

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...

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Concept explainers

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.

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3. Natural thorium consists entirely of the alpha-radioactive isotopes 232Th which has
a half-life of 1.4 × 1010 y. If a rock sample known to have solidified 3.5 billion years
ago contains 0.1 percent of 232Th today, what was the percentage of this nuclide
it contained when the rock solidified?

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