Q3(a) The half-life of a particular radioactive isotope is 6.5 h. If there are initially 48x 1019 atoms of this isotope, how many atoms remain at the end of 26 h?
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Q: The decay behavior of a radioactive substance obeys first order kinetics: ln(N/No) = –kt, where N is…
A: first order kinetics,lnNN0=-ktwhere N is amount of radioactive nucle at timehalf life=20 min=1200…
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Q: A sample of radioactive nuclei has N0 nuclei at time t = 0. The half-life of the decay is T1/2. In…
A: Activity is, R=-∆N∆t
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Q: An 1 g sample of a radioactive element takes 83.92 million years to reduce into 1 µg. Calculate the…
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Q: Uranium-235 has a half-life of 7x10^8 years. An initially pure sample with mass 10 kg is created in…
A: Given data, Half-life t12=7×108 years Initial mass m0=10 kg
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Q: A radioactive sample has a mass of 999 grams. How much remains after 2 half-lives?
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A: Given: The half-life time is 103 years. The remaining sample is 4 g. The total amount of the sample…
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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.
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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…
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A: 2.Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle. An…
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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…
A: Half life of the carbon-14 Activity of the fresh wood Activity of the decayed wood
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Q: 1. The decay of radioactive substance is given by -t T N = Nᵒe (1), where N is the number of atoms…
A: You are using incorrect symbol for Tau (decay constant).
Q: A nuclear isotope has a mean lifetime of 76.7 s. What is the half life of this isotope? Number If…
A: a) Given, mean life time, τ = 76.7 s and the relation between mean life time and half life T1/2 is,…
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A: Relation between activity of the radioactive isotope and half life…
Q: Suppose we have a sample containing 1.91 mCl of radioactive 131 (t,2 - 8.04 d). (a) How many decays…
A: Solution: Given that half-life of the sample, t1/2 = 8.04 days = 694656 s. Time for decay, t = 5week…
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Q: Isotope X has a half-life of 100 days. A sample is known to have contained about 1,500,000 atoms of…
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Q: A radioactive material is disintegrating in such a way that after 24 seconds, there is only 20.5% of…
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Q: A radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013…
A: Radioactivity is the process of decay of heavy nuclei due to an unstable nuclei or due to a…
Q: The decay of radioactive substance is given by N = Noe (1), where N is the number of atoms present…
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Q: One isotope contains an equal number of protons and neutrons, another isotope of the same element…
A: Let AM1 be the atomic mass of first isotope and AM2 is the atomic mass of second element. We know…
Q: 8. The half-life for a radioactive isotope is 4.00 × 10⁹ yr. Determine the age (in years) of a rock…
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Q: 3. An elevator starts from the third floor and moves downward. The v-t graph of a person riding the…
A: We will use Newton's equation of motion to answer the questions. The detailed steps are as follows.
Q: 5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a.…
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Q: Supposed that a radioactive substance has decayed until only of 1/8 of it remains. How many…
A: let initial number of Nucleons= N0 remaining number of Nucleons= N =N08
Q: 64 g of a radioactive substance is prepared. 105 hours later, only 16 g remains. To the nearest…
A: To the nearest hour, the radioactive half-life of the substance is 52.5hours
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