Cesium-131, 13 Cs, is a radioactive isotope used to treat prostate cancer. The half-life of 131 Cs is 9.70 days. If a dose with an activity of 128 µCi is given to a patient, how many days will it take for the activity of 131 Cs in the patient to reach 4.00 µCi? time: days

Q: The half-life of bismuth-210, 210Bi, is 5 days.(a) If a sample has a mass of 200 mg, find the amount…

A: Solution-  (a)-The half life periods of Bismuth-210 is 5days.the rate of decay of any substance…

Q: A dinosaur remain has a C-14 isotope and has a half-life of 5,715 years. The activity of this is…

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Q: (11) Lead-211 is a radioactive isotope with a half-life of 36.1 minutes. How long will it take for…

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Q: A sample of cobalt-60 was labelled as having an activity of 3.25mCi, but upon inspection, it…

A: Co-60 is used medically for radiation therapy as implants and as an external source of radiation…

Q: (Q121) Technetium-99 is an unstable isotope used in various medical procedures. Given a half life of…

A: Given: half life (t12)=8.01 hrsmass=1.41 ug To find: Activity in Ci

Q: A radioactive isotope has a half-life of 84.3 minutes. How long will it take for the radiation from…

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Q: A 76 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

A: Given : Half life=12 hr Initial amount, [A]o=76 mg The final amount, [A]=? Time, t=3.5 days= 3.5 x…

Q: c- A freshly prepared sample of a certain radioactive isotope has an activity of 10 mCi. After an…

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Q: How many days will it take for a radioactive isotope with a half-life t1/2 = 134 days to decay to…

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Q: 40K decays to 40Ar with a half life of 1.27x10^9 years. What is the age of a rock in which the…

A: Recall the expression of remaining amount due to radioactive disintegration Remaining amountA=A∘2nSo…

Q: 8. Patients with Graves disease have an overactive thyroid gland, and are commonly treated with…

A: Given the half-life of I-131, t1/2 = 8.0 days Initial activity, Ao = 9.9 mCi

Q: Co-60 is used extensively in radiotherapy. Its half-life is 5.27 years. How many years will it take…

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Q: A sample of gas from a basement containing radon-222 has an activity of 7 pCi/L, which is above the…

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Q: 1 A radioisotope has a half life of 4 days. How much of a 20-gram sample of this radioisotope…

A:

Q: Fluorine-18 is a radioactive isotope commonly used in medicine.  It has a half-life of 110 minutes.…

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Q: Ca-60 is used extensively in radiotherapy and its half-life is 5.27 years. How many years will it…

A: Given: half life, t12=5.27 years[A]=0.2[A]o To calculate: Years taken to decrease to 20% of its…

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: Radon 222 is a radioactive substance which undergoes radioactive decay Here we are required to find…

Q: Iodine-131, in a sodium iodide tablet, is used to measure the activity of the thyroid gland. If a…

A: Nuclear chemistry is a branch of chemistry which involved the study of reactions in the nucleus. The…

Q: A tiny piece of paper taken from the Dead Sea Scrolls has an activity of 10.8 disintegrations per…

A: Radioactive disintegration follows first order kinectics. Hence, the rate of decay can be followed…

Q: Fluorine-18, which has a half-life of 110 min, is used in PET scans.  If 100. mg of fluorine-18 is…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

Q: A piece of charcoal from a tree killed by the volcanic eruption that formed the crater in Crater…

A: The radioactive decay follows first-order kinetics. We know that the half-life of carbon-14 is 5730…

Q: Carbon-11 radioactively decays by positron emission with a half-life of 20.4 minutes. If a dosage of…

A: Given that : The half-life of carbon-11 = 20.4 min We have to calculate the % of carbon-11 will…

Q: A 26.00-g sample of water containing tritium, 31H, emits1.50 x 103 beta particles per second.…

A: In radioactive decay, radioactive atom's nuclei (unstable) eject energy as well as charged particles…

Q: Iodine-125 (125I) is used to treat, among other things, brain tumors and prostate cancer. It decays…

A:

Q: The radioactive nuclide P# has a half-life of 14.3 days. How long would a waste containing 10 mg/L…

A: Answer: Radioactive reactions are first order reactions, therefore integrated rate law of first…

Q: What is the half-life of radium-226 if 3.41x10 years are required for the activity of a sample of…

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Q: Part 1.1. If a radioactive element has a half-life of 2.5 million years, the amount of parent…

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Q: 10. The 14C content of an ancient piece of wood was found to be one-sixteenth of that in living…

A: The question is based on the concept of carbon dating. We have been given the fraction of carbon…

Q: A patient ingests 155 mg of I-131, a beta emitter with a half-life of 8.0 days. Assuming that none…

A: Half life, t ½ = 8 days= 691200 sDecay constant, k = 0.693/ t ½ = 0.693 /691200 s = 1 x 10-6 s-1.

Q: A sample of F-18 has an initial decay rate of 1.5 x 10° dis/s. How long will it take for the decay…

A: When an atomic nucleus breaks down by itself that results in the release of energy and matter, such…

Q: Phosphorus-32, 32P, is a radioactive isotope used in the treatment of leukemia. The half-life of $2P…

A: Radioactive decay of element is first order kinetics , in which half life of molecule is independent…

Q: A tiny piece of paper (produced from formerly living plant matter) taken from the Dead Sea Scrolls…

A: Radioactive disintegration follows first order kinetics. Hence, the rate of decay can be followed by…

Q: While exploring a coal mine, scientists found plant fossils which had been preserved by an…

A: Given: Amount of carbon-14 in fossil = 20 counts/min = Nf Amount of carbon-14 in living tissue = 160…

Q: (c ) Iodine-131 has a half-life of 8 days. How many grams of I-131 in a 4.0 g sample remain after…

A: (c) The amount of the isotope that remains after given decay time is calculates by using below…

Q: 11. If it takes 20-hours for a radionuclide to-decay from 48,000 counts per minute to- 3,000-counts…

A:

Q: 10. The carbon-14 decay rate of a sample obtained from a young tree is 0.260 disintegration per…

A: Given information:Decay rate of young sample = 0.260 disintegration per secondDecay rate of another…

Q: The half-life of carbon-14 is 5730 years. The wrapping of an Egyptian mummy gave off 3.8 counts per…

A: From the given data we haveHalf life of carbon-14=5730 yearsWrapping of mummy=3.8…

Q: A radioactive isotope has a half-life of 46.3 minutes. how long will it take for the radiation from…

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Q: An 80-mg sample of technetium-99m is used for a diagnostic test. If Tc-99m has a half-life of 6.0…

A: Given  Initial Amount of Sample (A)0 = 80 mg  Half life ( t1/2 )  = 6 hour Time ( t )   = 24 hour…

Q: A sample of F-18 has an initial decay rate of 1.5 × 10^5/s. How long will it take for the decay rate…

A: Radioactive decay is a first-order decay process.Given, half-life of F-18, t1/2 = 1.83 hours.Initial…

Q: An artifact classified as bone, found in a site at Paviland Cave, Wales, is found to have a ¹4C…

A: Given that -  Initial activity , [A]0 = 0.255 counts per second per gram Carbon  Final activity, [A]…

Q: A radionuclide undergoes beta decay with half-life of 30.0 years. How many years will it take for 25…

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Q: A sample of cesium-137 has an activity of 8.00 mCi.  How many micrograms of Cs-137 are present in…

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Q: How long will it take a radioactive sample of iodine-131 (half-life 8.07 d) to lose

A: The spontaneous disintegration of alpha, beta and gamma radiations by a substance irrespective of…

Q: Iron-59 has a physical half-life of 45 days. If 96 g of a radioactive iron sample (59Fe) is received…

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Q: A wooden object from an archeological site is subjected to radiocarbon dating. The activity due to…

A: Since the decay reactions are first order reactions And we know that the relationship between the…

Q: Strontium-89 is a beta emitter with a half-life of 50.6 days that is used in bone cancer treatment.…

A: Radioactive decay follows first order kinetics. t1/2 = 0.693/k   (where, k = decay constant) t =…

Q: A patient is given 0.050 mg of Tc-99. How long until the isotope decays to 6.3 x 103 mg? (Half life…

A: Given  Mass of Tc-99  [ A0 ] = 0.050 mg  Remaining Tc -99 [ At ] = 6.3 × 10-3 mg  Half life ( t1/2 )…

Q: At 8:00 a.m., a patient receives a 58-mg dose of I-131 to obtain an image of her thyroid. If the…

A: At 8:00 a.m., a patient receives a 58-mg dose of I-131 to obtain an image of her thyroid. If the…

Q: Radiation workers enter an area for 20 minutes in which they are subjected to 50 keV neutron…

A: