Practice question

What is the radioactive half-life of a radionuclide?

  1. The time it takes for a truck to travel half its journey distance
  2. The expiration date printed on outer cardboard packaging
  3. The time required to heat water to 50 degrees Celsius
  4. The time required for half of the radioactive atoms in a sample to undergo decay and transform into another state

Answer: D — The time required for half of the radioactive atoms in a sample to undergo decay and transform into another state

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