A sample of Radon-222 has a half-life of 3.8 days. How long will it take for the sample to decay to 1/16 of its original amount?
Q1. A sample of Radon-222 has a half-life of 3.8 days. How long will it take for the sample to decay to 1/16 of its original amount?
Answer: 15.2 days
Explanation: To decay to 1/16, it takes 4 half-lives (1/2)^4 = 1/16. 4 * 3.8 days = 15.2 days. Option 'B' calculates for 2 half-lives.