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19 Jul 2018
57. The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay? Ifa sample of U-238 initially contained 1.5 x 10 atoms when the universe was formed 13.8 billion years ago, how many U-238 atoms does it contain today?
57. The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay? Ifa sample of U-238 initially contained 1.5 x 10 atoms when the universe was formed 13.8 billion years ago, how many U-238 atoms does it contain today?
Nestor RutherfordLv2
19 Jul 2018
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