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Olympiad workbookNSECStructure of Atom

Decay of radioisotopes follows first order kinetics. Radioisotope U²³⁸ undergoes decay to a stable isotope, Th ²³⁴ . The ratio of the number of atoms of U ²³⁸ to that of Th ²³⁴ after three half lives is

Options

  1. A1 / 3
  2. B3/4
  3. C1 / 4
  4. D1 / 7

Correct answer

D. 1 / 7

Step-by-step solution

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