Thorium-232 Half-Life Problem | Arthur Beiser Modern Physics Solved (Rock Age 3.5 Gy)

Описание: Natural thorium consists entirely of the alpha-radioactive isotope 232Th which has a half-life of 1.4x1010 y. If a rock sample known to have solidified 3.5 billion years ago contains 0.100 percent of 232Th today, what was the percentage of this nuclide it contained when the rock solidified?
Step-by-step solution to Problem 18 of Chapter 12 from Arthur Beiser’s "Concepts of Modern Physics.”

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