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Question 3. If a basalt rock (sample B) contains 500 out of 1000 atoms of radioactive parent atoms of element K, how old is the

Question 3. If a basalt rock (sample B) contains 500 out of 1000 atoms of radioactive parent atoms of element K, how old is the rock? A. 125 million years old B. 250 million years old C. 375 million years old D. 500 million years old

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