Weegy: All radioisotopes decay at the same rate. False . Each radionuclide decays at its own unique rate which cannot be altered by any chemical or physical process. User: Iodine-131 has a half-life of 8.07 days. What fraction of a sample of iodine-131 is left after 16.14 days?
Weegy: Iodine-131 has a half-life of 8.07 days. After two half-lives, or 16.14 days, the fraction of iodine-131 remaining is ... (More)