6 In the 1970s and 1980s East German Secret Police Stasi used scandium 46 to track suspected dissidents Sc 46 has a half life of

Question

6 In the 1970s and 1980s East German Secret Police Stasi used scandium 46 to track suspected dissidents Sc 46 has a half life of 83 79 days How many days would it take for only 1 8 of a sample to remain undecayed on a suspect

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