A certain radio'sotope has a half-life of 11.7 days. What percentage of an initial sample of this isotope remains after 22 days?
Q: The isotope Np-238 has a halflife of 2.0 days. If 96 were present on Monday, how much will remain…
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Q: The activity of a radioactive isotope is 16000 disintegrations/sec. The activity drops to…
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Q: How many half-lives would have to elapse for a sample of a radioactive isotope to decrease from an…
A: No = 192 cpmN = 3 cpm
Q: A radioactive isotope decays at a rate proportional to the amount present at time t and has a…
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Q: Material found with the body had a C-14 activity of about 0.215 Bq per gram of carbon, where the A0…
A: The half life is t1/2=5730 yrs
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Q: Half-life of radioactive element 13153I is 8.0252 days. (A) Its decay constant, λ (B) Percentage…
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Q: If a 1.90 cm thick piece of lead can absorb 90.0% of the γ rays from a radioactive source, how many…
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Q: The radiocarbon content of 14C decreases after the death of a living system with a half-life of 5730…
A: The formula of the radioactivity is given below where, T is the half life, t is the time, Ro is the…
Q: The stable isotope of sodium is 23Na. (a) Find the total binding energy and the binding energy per…
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Q: Radon-222 has a half-life of 3.8 days. What mass of radon-222 would have a decay rate of 2220 Bq?…
A: We use the formula of rate of decay to get the required values.
Q: The half-life of 131t is 8.04 days. (a) Convert the half-life to seconds. (b) Calculate the decay…
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Q: A radioactive sample containing approximately 6.52×10¹3 radioactive nuclides has a half-life of 5730…
A: Radioactive nuclides are those nuclides that are unstable. This happens due to the mismatch between…
Q: The nucleus 10 4Be undergoes β- decay. The atomic mass of 10 4Be is 10.013535 u. (a) How much…
A: (a) 10Be radiates a β-particle and decays to 10B spontaneously. Let M, M0 and M1 denote the masses…
Q: Bananas contain 3.58 mg of potassium per gram. 0.0117% of natural potassium is the radioactive…
A: Most of the nuclei present in nature are unstable. That's why nuclear decay occurs. The Nucleus…
Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: element
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Q: The half-life of 131I is 8.04 days. (a) Convert the half-life to units of seconds. s (b) What is…
A: As per guidelines , only 3 subparts are solved here. The half-life of 131I is 8.04 days. (a) 1 days…
Q: Suppose a radioactive material, UPinium, was found under the chemistry building in 2000 (year). In…
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Q: A specific radioactive material was measured to have an activity of 347 MBq at 7:00 A.M., what is…
A: Given: The initial activity of the radioactive material at t = 0 (7:00 A.M) is A0 = 347 MBq The…
Q: Q3:- The half-life of 31 is 8.04 days. (a) Calculate the decay constant for this isotope. (b) Find…
A: Given, Sample element is I131 half life of I131 is, T12=8.04 days a) According to radioactive…
Q: The half-life of 222Rn is 3.82 days. (a) Convert the half-life to seconds. 330048 (b) Calculate the…
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Q: A certain isotope has a half-life of 9.06 h. What is its decay constant in s-1?
A: Given: The half life time is 9.06 h.
Q: A radioactive sample contains 1.55g of of an isotope with half a life of 3.8 days. How much of the…
A: Given data: Original amount of substance (N0) = 1.55 g Half life (T1/2) = 3.8 days Time (t) = 11.4…
Q: Plutonium-238 (238Pu) is a radioactive isotope with a half-life of 87.7 years. If a sample of 238Pu…
A: Given Half life=87.7year Activity after the=438.5year
Q: A sample of radioisotope has a decay constant of 9.976✕10-7 s-1 and prepared with an initial…
A: Given data: The decay constant of a sample of a radioisotope is, The initial activity of a sample…
Q: The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: Co decays with a half-life of 5.27 years to produce 8 Ni. 60 (a) What is the decay constant for the…
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Q: A radioactive sample is prepared; 10.78 hours later, only 1/16th of the original sample remains.…
A: Activity N=N0e-λt 10.78 hours later, only 1/16th of the original sample remains N016=N0e-λ10.78…
Q: An 85 kg radiation worker accidently ingest 1.0 mg of Po211. Assume that Po211 resides in the body…
A: The decay constant for Po211 can be calculated as below, Here τ is the half-life of Po211.
Q: A source of a certain isotope with a half-life of 20s is produced at time t=0s. For this source, we…
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Q: an element with initial mass 1 kg started radioactivity in 2021 , in which year the element will…
A: The mass is proportional to the radiation concentration. Which means that the radiation equation can…
Q: The half life for the decay of carbon-14 is 5.73* 10^3 years. Suppose the activity due to the…
A: The half life for the decay of carbon-14 is 5.73* 10^3 years. A tiny sample of an artifact made of…
Q: The half life for the radioactive decay of Ce-141 is 32.5 days. If the sample has an activity of 4.0…
A:
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