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Natural Uranium is a mixture of ₉₂²³⁸ U and ₉₂²³⁵ U with a relative mass abundance of 140: 1 . The ratio of radioactivity contributed by the two isotopes of natural uranium, if their half-lives are 4.5 10^9 years and 7.0 10^8 years respectively is

Options

  1. A99.3: 0.7
  2. B50.3: 49.7
  3. C95.6: 04.4
  4. Dcannot be estimated

Correct answer

C. 95.6: 04.4

Step-by-step solution

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