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The activity of a radioactive sample is measured as 9750 counts per minute at t = 0 and as 975 counts per minute at t = 5 minutes. The decay constant is approximately
  • a)
    0.922 per minute
  • b)
    0.691 per minute
  • c)
    0.461 per minute
  • d)
    0.230 per minute
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The activity of a radioactive sample is measured as 9750 counts per m...
DN/dt = KN
9750 = KN0 ……(1)
975 = KN ……..(2)
Dividing (1) by (2)
N/N0 = 1/10
= 0.4606 = 0.461 per minute
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The activity of a radioactive sample is measured as 9750 counts per minute at t = 0 and as 975 counts per minute at t = 5 minutes. The decay constant is approximatelya)0.922 per minuteb)0.691 per minutec)0.461 per minuted)0.230 per minuteCorrect answer is option 'C'. Can you explain this answer?
Question Description
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