Assuming that many radioactive nuclides can be consid-ered safe after 20 half-lives, how long will it take for each ofthe following nuclides to be safe: (a) 242Cm (t1/2=163 days);(b) 214Po (t1/2=1.6x104s); (c) 232Th (t1/2=1.39x1010yr)?

Q: The half-life of 26?? 59 is 44.6 days. How long will it take for 95.0% of a sample of this nuclide…

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Q: A radioactive sample contains 3.01×1018 atoms of a nuclide that decays at a rate of 3.28×1013…

A: The radioactive decay follows first-order reactions. Therefore, N = N0 e -λt

Q: = 176.5 h) to decay. Use the Calculate the time required for 46.80 % of a sample of X (t, formula…

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Q: The fraction of a radioactive isotope remaining at time tis  (1/2)t/t1/2, where t1/2is the…

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Q: You have a sample of unknown medication that is radioactive. You believe you should be able to…

A: Given: The initial activity, (A0) = 1.14×106 Bq. The activity after 11.1 hrs, (A) =  6.60×105 Bq.…

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Q: You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated…

A: Given: The beta decay rate is measured at = 690 decays/min. sample from the totem pole contains =…

Q: If 2.8x10-10% of the atoms of a radioactive isotope disintegrate in 1.0 yr, what is the decay…

A: As the radioactive decay is first order reaction, the expression is given as, Here,  N0 indicates…

Q: A freshly purified 2.00 g sample of the alpha particle emitting radionuclide 244 Am is prepared then…

A: Mass of radionuclide = 2.00 gVolume of evacuated container = 0.100 LTemperature = 25 °CPressure =…

Q: A 56 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

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Q: The nuclide 19O, prepared by neutron irradiation of 19F, has a half-life of 29 s.(a) How many 19O…

A: Radioactive decay follows first order kinetics.

Q: a rock conatains 0.257mg of Pb-206 for every milligram of U-238. The half-life for the decay of…

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Q: Calculate the time required for 52% of a sample of A (t1/2 = 7510 y) to decay.

A: Given that : The half-life of sample A (t1/2)= 7510 y We have to calculate the time required for 52%…

Q: A certain radioactive element undergoes a sequence of four radioactive decay steps, in the order…

A: Given information,

Q: The half-life of the nuclide 211 At is 7.5 h. If 0.100 mg of this nuclide is administered for…

A: The answer to the following question is-

Q: An ancient skull has a carbon-14 decay rate of 0.85 disintegrationsper minute per gram of carbon…

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Q: 1.) A researcher claims that an ancient scroll originated from Greek scholars in about 500 B.C. Its…

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Q: e uranium decay series from U-238 to stable lead (Pb-206) is: U → 234Th → 234Pa → 234U → 230 Th →…

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Q: 1a) How long will it take for 30 g of 222Rn to decay to 7.5 g? 1b) How many grams of 1°N will be…

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Q: When the nuclide 214Bi decay, the decay 40. 83 *Po or 210TI, because 81 product is either 214, 81…

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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: How many of the nuclei of a radioactive sample containing 2048nuclei decay in 3 years, if its half…

A: The number of nuclei of a radioactive sample containing 2048 nuclei that decays in 3 years is to be…

Q: Caesium-137 decays via β - emission with a half-life of 30.17 years. A sample is initially measured…

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Q: Radium-221 has a half of 30 sec. How long will it take for 82% of a sample to decay?(Round your…

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Q: A sample of Tl-201 has an initial decay rate of 5.88 × 10^4/s. How long will it take for the decay…

A: First, the rate constant value is determined by using the given half life period.

Q: 6. Iridium is a radioactive elementused fortherapy in nucle armedicine. It decaysto% or 24, of its…

A: Answer: Nuclear reactions are first order reactions, therefore decay reaction of Ir will also be a…

Q: 90Sr is one of the most deadly products of nuclear fi ssion. Assume that 4% of the fi ssion fragment…

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Q: Potassium-40 decays to argon-40 with a half-life of1.27x109 yr. What is the age of a rock in which…

A: Half-life: It is defined as the time required for a quantity to reduce half of its initial value.…

Q: Iodine-125 (¹251) is used to treat, among other things, brain tumors and prostate cancer. It decays…

A:

Q: The radioactive nuclide 60Co as a half-life of 5.27 years. Calculate the mass (in g) of "Co that…

A: Formula: N=Noe-λt

Q: Tritium, of hydrogen-3, is prepared by bombarding lithium-6 with neutrons. A 0.250-mg sample of…

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Q: A laboratory rat is exposed to an alpha-radiation sourcewhose activity is 14.3 mCi. (a) What is the…

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Q: Cobalt-60 is commonly used as a source of beta-particles. How long does it take for 87.5% of a…

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Q: The Q value for the alpha decay of Tl203 is calculated to be 0.91 MeV from the masses of the initial…

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Q: Gold-198, a β-emitter used to test leukemia, has a half-life of 2.695 days. The standard dosage is…

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Q: The isotope 208Tl undergoes β decay with a half-life of 3.1 min.  How many minutes will it take for…

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Q: 3.) The Radioactive nuclide co has a half-Life of 8.5 hours, 55 27 what mass of Co Temains from a.…

A: Mass of sample remains after 18 hours is       0.0045 g.

Q: a. Write the β- decay reaction.  b. What is the initial number of Cs-137 atoms in the sample?   c.…

A: Nuclear kinetics follows first order kinetics and all formulas of first order reaction is applicable…

Q: i) The possible decay series from radon-222 to produce lead-210 is as follows: 2ERN → 21Po 214Pb →…

A: Radioactive nuclear reactions are the reactions in which there will be changes in the mass number…

Q: Calculate the binding energy per nucleon for the nitrogen-14 nucleus, whose mass is 14.003074 u. The…

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Q: 14Cdecays by B-emission and after 12.0 h, ninety percent of the radioactive substance remains.…

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Q: The nuclide 131I undergoes beta decay with a half-life of 8.041 days. Large quantities of this…

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Q: The scene below represents a reaction (with neutrons grayand protons purple) that occurs during the…

A: The general notation of the nuclide is XZA , where;                            A = number of protons…

Q: Phosphorus-32 (3215P) decays by beta emission and it has a half-life of 14.3 days. Determine the…

A: Answer - The correct option is (A) 5.2 x 104 Ci

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.