Chapter 2

What are the percentages of the two elements after three half-lives of potassium-40? 25% Potassium-40 and 75% Argon-40. Does a geologist have to wait 1.3 billion years before seeing a difference in the amounts of these two elements? Explain. No, the object decays at a constant rate. LT 8. Describe the characteristics of the Earth's interior. ................
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