21. Nuclear Chemistry - Part 3 of 3
21. Nuclear Chemistry / Rate of Radioactive Decay / Problem 2
Americium is a synthetic radioactive element. An isotopic mixture was made in a laboratory that had equal amounts of 241Am and 243Am in it. After some time, the observed ratio of the two isotopes was 0.158. The half-lives of 241Am and 243Am are 432.2 h and 7370 h, respectively. How old is the mixture after the change?
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