To find out an igneous rock contains a Pb-206/U-238 mass ratio of 0.372. Concept Introduction: Half life is the time required by the sample to decrease to its half concentration of the initial concentration. The half life can be shown as t 1 2 = 0.693 k K is decay constant

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Chapter 20, Problem 8SAQ

Interpretation Introduction

Interpretation:

To find out an igneous rock contains a Pb-206/U-238 mass ratio of 0.372.

Concept Introduction:

Half life is the time required by the sample to decrease to its half concentration of the initial concentration.

The half life can be shown as

$t_{\frac{1}{2}} = \frac{0.693}{k}$

K is decay constant

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