Fluorine-18, which has a physical half-life of 110 min, is used in PET scans. if 1.00g of fluorine-18 is shipped at 5:00 PM, how many milligrams of radioisotopes are still active if the sample arrives at the nuclear Laboratory at 9:30 am the next morning?

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: 1. A substance has a mass of 5 grams after decaying for 100 minutes. What was the mass of the…

A: Given that: Mass of substance left after decaying = 5 g Total time for decaying of substance = 100…

Q: In addition to C-14, K-40 is often used for archeological dating. K-40 decays to Ar- 40 by positron…

A: The rate of radioactive decay has been proven to be of first order kinetics. Using the understanding…

Q: (21) Fluorine-18 is a radioactive isotope commonly used in medicine. It has a half-life of 110…

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Q: (28) An archaeologist claims that a bone in her collection is from a saber-toothed tiger that is…

A: Given that, for a carbon-14 The initial decay rate is -dNdt0 = 15.3 disintegrations per minute per…

Q: a radionuclide (which has no parent) has a half- life of 8.0 days, how much of the original…

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Q: Determine the half-life of a radionuclide if after 18 days the fraction of undecayed nuclides…

A: Half-life (t1/2) represents the amount of time at which the concentration of the radioactive nuclide…

Q: If the half-life of a parent material is 10 Ma, and about 88% (rounded) has decayed to daughter…

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

A: Initial rate of disintegrations = 0.260 Final rate of disintegrations = 0.186  Half live = 5630yr…

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: An old piece of wood has a carbon-14 content of 0.0156 times that 14 is the age of the old wood if…

A: We will use first order kinetics formula

Q: A sample of rock was found to contain 8.23 mg of rubidium-87 and 0.47 mg of strontium-87.(a)…

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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: 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: -33. The number of radioactive nuclides in a sample decays from 1.00 × 1020 to 2.50 × 10º in 10.0…

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Q: A piece of a spear handle is found in an archaeological dig in Central America. It contains 12.5% as…

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Q: 32) The charcoal from ashes found in a cave gave 3.34 14C counts per gram per minute. Wood from the…

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Q: A 2.00 gram radioactive substance undergoes decay.  After 60 minutes, 1.50 grams have decayed.  What…

A: Radioactive decay generally follows first-order kinetics and for first-order kinetics:…

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: Calculate how long will it take for a sample of a radionuclide with a half-life of 31.3 days decay…

A: Given, Half life = 31.3 days  Time , t = ?

Q: [References) A rock containing 8 mg of plutonium-239 per kg of rock is found in a glacier. The…

A: Radioactive decay, also known as radioactive disintegration, is when an unstable nucleus loses its…

Q: A sample of wooden artifact is found to undergo 9.0 6C 1? disintegrations per minute per gram of…

A: Given: The activity of wood sample = 9.0 disintegrations per min. The activity of fresh wood = 15…

Q: A sample of coral has a carbon-14 content of 12.5% the value of living coral.  If the half-life of…

A: Given  Half life of Carbon - 14 = 5730 years Remaining amount   = 12.5 %  Time ( t ) = ?

Q: The half life of radium 226 is 1602 years. If you have 500 grams of radium today how many grams…

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Q: A radioactive isotope has a half-life of 24.5 minutes. how long will it take for the radiation from…

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Q: A wooden artifact is subjected to radiocarbon dating. The activity associated with its 14C content…

A: Since the decay reactions are first order reactions. Hence the relationship between the activity and…

Q: The carbon−14 decay rate of a sample obtained from a young tree is 0.250 disintegration per second…

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Q: carbon as a piece of modern charcoal. How long ago was the tree burned to make the ancient charcoal?…

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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: 1. If the amount of the parent isotope in the original sample of a rock had been 48 grams, about how…

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Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the…

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Q: The half-life of copper-67 is 61 hours.  If an original sample contains 24 grams how many grams are…

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Q: You are working in a facility with a linear accelerator which may be used to measure the level of C…

A: Radioactive decay is a process in which unstable atomic nuclei emit energy in the form of…

Q: A substance X initially weights 56 grams. After 6 minutes, it was observed that its mass decreased…

A: Mass at starting (t=0) = 56 grams Mass after 6 min = (56-12) g                                = 44 g…

Q: The half life of a specific radionuclide is 8 days. How much of an 80mg sample will be left after 24…

A: There are two methods to solve it : Method (1): The half life is the time in which any compound is…

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: True or false? During one half-life, the mass of a radioisotope is reduced by half. Explain.

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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: Suppose a small quantity of radon gas, which has a half-life of 3.8 days, is accidentally released…

A: To calculate the number of days the laboratory remains evacuated

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 radioactive isotope has a half-life of 84.5 minutes. How long will it take for the radiation from…

A: Half life t1/2 = 84.5 min = 5070 s

Q: The cloth shroud from around a mummy is found to have a 14C activity of 8.3 disintegrations per…

A: Given, The initial decay rate of carbon of cloth = 8.3 dis/min. The decay rate of carbon for living…

Q: If 1.50 gram of a 2.00 gram sample of a radioactive substance undergoes decay in 60 minutes, then…

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Q: A sample of wooden artifact is found to undergo 8 HC disintegrations per minute per gram of carbon.…

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Q: (28) An archaeologist claims that a bone in her collection is from a saber-toothed tiger that is…

A: we have to calculate decay rate of bone

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: Uranium235 decays to a form of Pb207 with a half-life of 710 million years. If an outcrop of rock…

A: Half life of the parent isotope = 7.1 × 108 years Since radioactive decay follows first order…