3 The half life of a substance is the length of time for an

Last updated: 7/3/2023

3 The half life of a substance is the length of time for an unstable element to spontaneously decay to one half of its original amount Plutonium 239 has a half life of 24 years The formula for half life is as follows M 100 0 5 Determine how long it would take for the sample to decay to only 5 0 g 31