Until roughly 1970, tritium (³H), a radioactive isotope of hydrogen, was a component of fluorescent watch dials and hands. For H, t/2 12.3 yr. 1st attempt See Periodic Table O See Hint Assume you have such a vwatch. If a minimum of 19.0% of the original tritium is needed to read the dial in dark places, for how many years could you read the time at night? Assume first-order kinetics. yr

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Until roughly 1970, tritium (³H), a radioactive isotope of hydrogen, was a component of fluorescent watch dials and hands. For 3H, t/2= 12.3 yr.
1st attempt
i See Periodic Table O See Hint
Assume you have such a watch. If a minimum of 19.0% of the original tritium is needed to read the dial in dark places, for how many
years could you read the time at night? Assume first-order kinetics.
yr
Transcribed Image Text:Until roughly 1970, tritium (³H), a radioactive isotope of hydrogen, was a component of fluorescent watch dials and hands. For 3H, t/2= 12.3 yr. 1st attempt i See Periodic Table O See Hint Assume you have such a watch. If a minimum of 19.0% of the original tritium is needed to read the dial in dark places, for how many years could you read the time at night? Assume first-order kinetics. yr
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