Q:

Which of the statements about the following three-step radioactive decay series is TRUE?

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Which of the statements about the following three-step radioactive decay series is TRUE?


  1. technetium 99 m is the parent of ruthenium 99
  2. molybdenum 99 is the parent of technetium 99
  3. ruthenium 99 is the daughter of molybdenum 99
  4. technetium 99 is the grand-daughter of molybdenum 99

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D: Technetium 99 results after two steps, from molybdenum 99. But “grand-daughter” may not be true technical terminology.

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