Answer: The radioactive decay of Tl-206 to Pb-206 has a
Chapter 19, Problem 19.27(choose chapter or problem)
The radioactive decay of Tl-206 to Pb-206 has a half-life of 4.20 min. Starting with 5.00 3 1022 atoms of Tl-206, calculate the number of such atoms left after 42.0 min.
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