A rock contains 0.684 mg of 200Pb for every 1.000 mg of 238U present. Assuming that no lead was originally present, that all the 200Pb formed over the years has remained in the rock, and that the number of nuclides in intermediate stages of decay between 238U and 206pb is negligible, calculate the age of the rock. (For 238U, t,12 = 4.5x10° years.)

A rock contains 0.684 mg of 200Pb for every 1.000 mg of 238U present. Assuming that no lead was originally present, that all the 200Pb formed over the years has remained in the rock, and that the number of nuclides in intermediate stages of decay between 238U and 206pb is negligible, calculate the age of the rock. (For 238U, t,12 = 4.5x10° years.)

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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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.

Question

A rock contains 0.684 mg of 20°Pb for every 1.000 mg of 238U present. Assuming that no lead was originally present, that all the 20°PPB formed over the years has remained in the rock, and that the number of nuclides in intermediate
stages of decay between 238U and 200Pb is negligible, calculate the age of the rock. (For 238U, t,2
= 4.5x10° years.)
yr

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