Naturally occurring uranium is composed mostly of 238U and 235U, with relative abundances of 99.28% and 0.72%, respectively. The half-life for 238U is 4.5 * 109 years, and the halflife for 235U is 7.1 * 108 years.Assuming that the earth was formed 4.5 billion years ago, calculate the relative abundances of the 238U and 235U isotopes when the earth was formed.

Given, relative abundance : U238=99.28 % U235=0.72% Half life : t1/2 of U238=4.5×109 yr t1/2 of…

Answered: Naturally occurring uranium is composed…

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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Naturally occurring uranium is composed mostly of ²³⁸U and ²³⁵U, with relative abundances of 99.28% and 0.72%, respectively. The half-life for ²³⁸U is 4.5 * 10⁹ years, and the halflife for ²³⁵U is 7.1 * 10⁸ years.

Assuming that the earth was formed 4.5 billion years ago, calculate the relative abundances of the ²³⁸U and ²³⁵U isotopes when the earth was formed.

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