A rock formed with 1000 atoms of a radioactive parent element, but only contains 250 radioactive parent atoms today. If the half-life is 1,000,000 years, how old is the rock? *appreciate if u could show the solution clearly. Tq ??

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ChapterU1: Alchemy: Matter, Atomic Structure, And Bonding
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A rock formed with 1000 atoms of a radioactive parent element, but only contains 250 radioactive parent atoms today. If the half-life is 1,000,000 years, how old is the rock? *appreciate if u could show the solution clearly. Tq ??
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