Deoxyglucose labeled with fluorine-18 is commonly used in PET scans to locate tumors. Fluorine-18 has a half-life of 109 minutes. How long will it take for the level of fluorine-18 in the body to drop to 10% of its initial value?

Q: Gallium-67 is used medically in tumor-seeking agents. What is the half-life of gallium-67 if 229…

A: Time = 229 hours  Reduced activity = 13.2 %  Half life time of gallium - 67 = ?

Q: Element X has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10…

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Q: Substance D initially weights 56 grams. After 6 minutes, it was observed that its mass decreased by…

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Q: Gadolium-153, which is used to detect osteoporosis, has a half life of 242 days. What percentage of…

A: Radioactive decay follows first order kinetics.Equation for half life, t½ = ln2 / kTherefore k = ln2…

Q: Phosphorus-32 (P-32, Z=15), a radioisotope used in the treatment of leukemia, has a half-life of…

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Q: Seaborgium-266 has a half-life of 30 seconds. How many half-lives will pass in 30 minutes?

A: Given values -> Half life = 30seconds Total time = 30 minutes

Q: The​ half-life of a radioactive substance is 50 years. If you start with some amount of this​…

A: Suppose we start with 1 gram of the sample. Therefore--- Initial amount (N0) = 1 g The half-life…

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

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Q: The half-life of Uranium-238 is approximately 4.5(10°) years. How much of a 10 kilogram block of U-…

A: Given data :- Half life = 4.5 x 109 years mass of uranium = 10 kg

Q: Iodine-131 is used medically for the diagnosis of thyroid illnesses. The rate constant for t decay…

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Q: The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The…

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Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

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Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

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Q: Element X has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10…

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Q: 11. The half-life of a newly discovered element, Jimmium, is 55 minutes. How long will it take a…

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Q: PLutonium-239, one of the radioactive by-products of nuclear power, represents a serious was…

A: Chemical kinetics is the study of the reaction that how fast or slow a reaction is taking place. The…

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

A: The half-life (t1/2) of Nitrogen-13 is provided as 10 minutes.

Q: Tritium, which is , has a half-life of 12.3 years. Calculate the amount of time it would take for…

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Q: A to 240mg sample of technetium 99M is used for a diagnostic test. if Technetium -99m has a…

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Q: Copper(II) acetate containing copper-64 is commonly used to study brain tumors. This isotope has a…

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Q: A sample of a newly discovered element, West Virginium, has a half-life of 288 years.  How long…

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Q: The half-life of protactinium-234 is 6.69 hours. What fraction of a given amount remains after 26.76…

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Q: Iodine-131 is used in the treatment of thyroid disease. What is the half-life of iodine-131 if a…

A: Weight of sample initially = 160mg Weight of sample finally = 5mg Time elapsed = 40 days We have to…

Q: Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.0…

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Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

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Q: Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of…

A: Half-life of Cs-137 and initial mass, from which amount of Cs-137 left after 90.6 years.

Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is…

A: ⊙ Radioactivity, phenomena follow first order            kinetics                K =2.303t…

Q: The half-life of radiogold is approximately 3 days. If 1.5 g of this has been administered to a…

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Q: Isotope X has a half-life of 71.8 years. If a sample initially contains 676. mg of X, what mass of X…

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Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: The initial mass of the sample of palladium-100, No, in mg is calculated as shown below where t1/2…

Q: The half-life of cobalt-60 is 5.3 years. How long will it take for a 1.000-mg sample of cobalt-60 to…

A: Given: The half-life of Co-60 is 5.3 years. The initial amount of Co-60 is 1.000 mg. The amount of…

Q: Calculate the half-life of an isotope if 155.2 mg disintegrates to 19.40 mg in 12.9 min.

A: Given    Initial Amount [ A ]0         = 155.2 mg    Remaining amount [ A ]t  = 19.40 mg   Time ( t…

Q: The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced…

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Q: The half-life for P-32, a radionuclide used in DNA sequencing, is 14.28 days. Calculate the…

A: All natural and artificial radioactive decays follows first order kinetics The integrated rate…

Q: The half-life of I-131 is 8.0 days. If a medical treatment involves a dose of 100. mg of I-131, how…

A: The remaining I-131 isotope after 16 days is calculated as shown below. where t1/2 is the half-life,…

Q: Some watch dials are coated with a phosphor, like ZnS, and a polymer in which some of the 1 H atoms…

A: Given, The half-life of the tritium is t1/2=12.3 yr. Time t is 50 yr. The rate constant can be…

Q: If the first-order half-life of tritium (°H) is 12.26 years, what amount of time is necessary for it…

A: The half-life is the time taken for the reaction to complete half of its original concentration

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

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Q: Chromium-51 nuclide is used in studies to evaluate the lifespan of red blood cells and bone marrow…

A: Chromium-51 is a commonly used radionuclide with a half-life of 27.7 days, emitting gamma rays with…

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

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Q: The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The…

A: Given : Half life of phosphorus-32 = 14.3 days And the final activity of sample of phosphorus-32 =…

Q: A 120-mgmg sample of technetium-99 mm is used for a diagnostic test. If technetium-99 mm has a…

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Q: The half-life of Palladium-100 is 4 davs. After 20 days a sample of Palladium-100 has been reduced…

A: The nuclear reactions of the radioactive elements are generally the first-order reactions. The…

Q: The half-life of tritium, H-3, is 12.3 years. How much time would it take for a sample to drop to…

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Q: The half-life of bromine-74 is 25 minutes.  How much of a 40 cpm sample is still active after 75…

A: Since bromine-74 is a radioactive element  hence it will have decay reaction  And since the decay…

Q: Sodium -25 has a half  life of 60.0 s. If 5.00 mg of sodium -25 disintegrated over a period of 3.0…

A: Atoms having same atomic number but different atomic masses are called isotope. For one there are…