A geologist finds an old rock and wants to determine its age using rubidium-strontium dating. This is possible because 87Rb, which has a half-life of 4.75×1010 y, undergoes ? − decay and becomes 87Sr. The geologist determines that the ratio of 87Sr to 87Rb is 0.219. Assuming there was no 87Sr in the rock when it was formed, determine the age of the rock.age of rock =

The age of the rock is 1.36 x 10¹⁰ years

Answered: A geologist finds an old rock and wants…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter30: Nuclear Physics

Section30.3: Radioactivity

Problem 30.4QQ: Suppose you have a pure radioactive material with a half-life of T1/2. You begin with N0 undecayed...

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A geologist finds an old rock and wants to determine its age using rubidium-strontium dating. This is possible because ⁸⁷Rb, which has a half-life of 4.75×10¹⁰ y, undergoes ?⁻ decay and becomes ⁸⁷Sr. The geologist determines that the ratio of ⁸⁷Sr to ⁸⁷Rb is 0.219. Assuming there was no ⁸⁷Sr in the rock when it was formed, determine the age of the rock.
age of rock =

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