s the rate constant (in min−1) for the decomposition of fluorine-18?   min−1 (b) If a sample of glucose containing radioactive fluorine-18 is injected into the blood, what percent of the radioactivity will remain after 4.98 h?   % (c) How long (in min) does it take for 99.97% of the 18F to decay

How old in years is a bottle of a solution if the deuterium 2H content is 67% that of a new wine? The half-life of deuterium is 1 century. 1. 0.58 yrs 2. 0.85 yrs 3. 58 yrs 4. 85 yrs

Radioactive phosphorus-32 decays with a half-life of 14.0 days. A chemist obtains a fresh sample of phosphorus-32 and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25% of the initial measured value. How many days does she have to perform the experiment?

Uranium-235 is commonly used in nuclear power plants and has a half-life of about 704 million years (2.22 ✕ 1016 s). Determine the decay constant for uranium-235. ____s−1

Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.0 days. If a patient with thyroid disease consumes a sample of Na 131 I containing 10. μ g 131 I, how long will it take for the amount of 131 I to decrease to 1/100 of the original amount?

The half-life of the radioactive isotope 137Cs is 30.17 years. How long does one have to wait until exactly 3% of the initial amount of this isotope remains? O A. 200.4 years O B. 140.1 years O C. 152.6 years O D. 29.26 years O E. 170.3 years

Every 3.5 years, substance X decays by 50%.  How long will it take for a 96.0 mg sample of substance X to decay and only have 3.0 mg of it remaining?

The half-life of carbon-14, an isotope used in archaeological dating, is 5730 years. What percentage of 14 6C remains in a sample estimated to be 17,000 years old?