Radium-226 is a common isotope on Earth, but it has a half-life of about 1620 years. Given

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Radium-226 is a common isotope on Earth, but it has a half-life of about 1620 years. Given that Earth is some 5 billions years old, why is there any radium at all?

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Conceptual Physical Science

ISBN: 978-0134060491

6th edition

Authors: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt

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Question Posted: Jan 26, 2019 12:35 PM

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Radium-226 is a common isotope on Earth, but it has a half-life of about 1620 years. Given

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Conceptual Physical Science

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