Radioactive carbon 11 has a half-life of 20 minutes. If there are 200 grams present at the start of our experiment, how many grams will remain after 10 minutes?
A) 141.421 g
B) 6.931 g
C) 50 g
D) 100 g

Question

Quizplus · Accepted Answer

After 10 minutes, which is half of the half-life period, the amount of carbon 11 will be reduced to the square root of the initial amount due to the exponential decay process. The square root of 200 is approximately 141.421 grams.

Radioactive Carbon 11 Has a Half-Life of 20 Minutes