The half-life of radioactive parent isotope Q is 1000 million years. Scientists testing a rock sample discover that the sample contains three times as many daughter isotopes as parent isotopes. What is the age of the rock?

  1. 1,000 million years
  2. 2,000 million years
  3. 3,000 million years
  4. 4,000 million years


2,000 million years

Environmental & Atmospheric Sciences

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