Problem 10
List at least five organs that can be imaged using radioactive isotopes.
Problem 10
Strontium-90 has a half-life of 28.1 y. If 66.7 Bq of pure strontium- 90 were allowed to decay for \(15.0 \mathrm{y}\), what would the activity of the remaining strontium- 90 be?
Problem 10
A process called helium burning is thought to occur inside older stars, forming carbon: \(3^{4} \mathrm{He} \rightarrow{ }^{12} \mathrm{C}\) If the reaction proceeds with 0.00781 g of mass lost on a molar basis, how much energy is given off?
Problem 10
Francium has an atomic number of 87 . Write the nuclear equation for the alpha particle emission of francium-212. What is the daughter isotope?
Problem 11
Uranium hexafluoride (UF \(_{6}\) ) reacts with water to make uranyl fluoride \(\left(\mathrm{UO}_{2} \mathrm{~F}_{2}\right)\) and \(\mathrm{HF}\). Balance the following reaction: \(\mathrm{UF}_{6}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{UO}_{2} \mathrm{~F}_{2}+\mathrm{HF}\)
Problem 11
Tin has an atomic number of 50 . Write the nuclear equation for the beta particle emission of tin-121. What is the daughter isotope?
Problem 11
How long does it take \(100.0 \mathrm{mCi}\) of fluorine- 20 to decay to \(10.0 \mathrm{mCi}\) if its half-life is \(11.0 \mathrm{~s}\) ?
Problem 11
Briefly describe how a nuclear reactor generates electricity.
Problem 11
An artifact containing carbon-14 contains \(8.4 \times 10^{-9}\) g of carbon-14 in it. If the age of the artifact is 10,670 y, how much carbon-14 did it have originally? The half-life of carbon-14 is \(5,730 y\)
Problem 12
Briefly describe the difference between how a nuclear reactor works and how a nuclear bomb works.
