How long will it take a sample of polonium-210 with a half-life of 140 days to decay to one-fourth of its original strength? Half life of radium is 44 years.The sample will reduce to 50% of its original value after how many years? ...
Using the half-life of 5,730 years, how many years would it take a 4.0-gram sample to decay to 0.25 grams? If a sample starts with 20 grams of radioactive material that has a half-life of 5 years, how many years would it take to on...
Describe how half-life might be useful in determining the age of a geological sample. What must be true of that material in order to use half-life to date it? What is the half-life of radioactive iodine? Assuming a half-life of 1599 years...