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  1. What does the ‘m’ stand for in 234mPa, and what does it mean?
  2. Which type(s) of radioactive decay are occurring in this experiment?
  3. Why is te trace not a smooth curve?
  4. Why is it necessary to stop the flow while measuring the counts?
  5. What is the major source of error in this experiment?
  6. Why was thorium not washed off the column with the protactinium and uranium?