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The atomic number of isotopes 150 and 190 is 8. the half-life of radioactive element 15, is 122.2 seconds. The half-life of the radioactive

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The atomic number of isotopes 150 and 190 is 8. the half-life of radioactive element 15, is 122.2 seconds. The half-life of the radioactive element 190 is also 26.9 seconds.since these two elements have an equal amount of nuclei in the state t=0, what is the ratio of the number of nuclei 150 / 190 in the case t=14 minutes? (o is oxygen atom)

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