Ask a New Question

Question

Radium-221 has a half-life of 30 s. How long will it take for 95% of a sample to decay
16 years ago

Answers

MathMate
Time required = 30 seconds * log(0.05)/log(0.5)
= 129.7 seconds
16 years ago
Shellie
Thanks...
16 years ago

Related Questions

The half-life of Radium-223 is 11.43 days. If a sample has a mass of 900 mg, find the mass (i... Radium has a half-life of 1620 years and decays into radon, which has a half-life of 3.82 days. A... The half-life of Radium-226 is 1590 years. If a sample contains 100 mg, how many mg will remain afte... Radium-223 has a half-life of 11.4 days.Approximately how long would it take for the activity of a s... The half life of radium is 3.82 days.In what time will the activity decay to 1/16 of its original va... If Radium-223 has a half life of 10.33 days, what time duration would it require for the activity as... The half-life of Radium-223 is 11.43 years. What is the annual decay rate? Express the result to fou... The half-life of radium-226 is 1,600 years and the half-life of carbon-14 is 5,730 years. In one to... The half - life of radium-224 is 3.5 days .what fraction of the sample remain undecaye after fourtee... The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain afte...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use