wackydenny99 wackydenny99 20-05-2023 Chemistry contestada The half-life of 221 Fr is 5 min. If the radioactivity of a sample of 221Fr is 0.32 pCi, what would the activity of this sample be after 15 min considering 1st order reaction? The Curie (Ci) is just a unit of radioactivity (like a concentration!)
