Multiple Choice
The activity of a sample of gas obtained from a basement containing radon-222 was found to be 8 pCi/L. This isotope has a half-life of 3.8 days. If no additional radon-222 entered the basement, how long would it take for the activity to decline to 1 pCi/L?
A) about 4 days
B) a bit more than 10 days
C) about 1 day
D) a bit less than 10 days
E) about 20 days
Correct Answer:
Verified
Correct Answer:
Verified
Q19: Radiation seed therapy is a common method
Q20: Radiation seed therapy is a common method
Q21: The activity of a radioactive sample is
Q22: Why are higher temperatures necessary for fusion
Q23: Which of the following nuclides are most
Q25: What repulsive forces must be overcome for
Q26: Fill in the missing nuclide to balance
Q27: The main radiation source humans are exposed
Q28: Which isotope is produced when <sup>222</sup>Rn decays
Q29: Which of the following nuclides are most