Calculate the half-life and average life
Q: A piece of bark is made up of carbon. It emits 7000 electrons per minute. Only the carbon 14 isotope…
A: number of electrons per minute = 7000 isotopic abundace of C-14 = 1.3×10-12
Q: %3D Given: m° Find: m 2. A fission reaction in the release of a treme how much was is the I Given:
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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…
A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…
Q: if you started with a parent isotope with 100% of its atoms and its half-life is 10 years. What is…
A: Given. t/T = 2 N(t) = No(1/2)t/T
Q: Tritium has a half-life of 12.3 years. Suppose there are initially 1.0 x 1012 tritium atoms. (a)…
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Q: A geologist finds an old rock and wants to determine its age using rubidium-strontium dating. This…
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Q: The table shows two isotopes of potassium and two isotopes of calcium. 39K 42K Stable B-decay…
A: GivenMass of electron (me) = 0.000549 uMass of proton (me) = 0.000549 uMass of neutron (me) =…
Q: Strontium is chemically similar to calcium and can replace calcium in bones. The radiation from ⁹⁰Sr…
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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: A sample of radium Ra (atomic mass=224.020 186 u, T12-3.66 days) contains No-3.68 x 1021 nuclei and…
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Q: The following nuclei have induced fission critical energies as listed below. From these data,…
A: We need to determine if the target Nucleus is fissile or fissionable.
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A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…
Q: The reactor incident in Chernobyl in 1986 was caused by operating errors. The moderator materials…
A: Given that:Half life,T12=30 yearsTime spent, t=36 yearsAlso, Cs55137 is a β emitter
Q: 5. (P19) A nucleus of element 114 is produced by fusing calcium - 48 with plutonium-244. Write the…
A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: 11 The stability of C with respect to alpha, B*, and B decay is to be determined. Do not consider…
A: Solution: As per the given data,
Q: After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an…
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Q: Tritium has a half-life (half-life) of 12.33 years. In a sample of tritium, what percentage of 3H…
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Q: (2) What is the mass defect of a He atom if the atomic mass is 4.002603 amu? Answer: ---- mass…
A: 2) The mass defect Additional Information: The mass of the proton, mp is 1.007276 u.…
Q: A sample of hypothetical element X decays by positron emission and has a half-life of 79 years. How…
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Q: A radium source contains 1.00 mg of 226Ra, which decays with a half-life of 1600 y to produce 222Rn,…
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Calculate the half-life and average life since 2,000 pg of the 33P isotope is reduced to 0.250 pg in 75.9 days by emitting-rays.
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- We obviously cannot wait for 4 million years to determine the half-life of technetium, or even 87.7 years to determine the half-life of plutonium. The half-life of a substance is determined using a Geiger counter, which is essentially a tube filled with an inert gas. When a particle decays and produces radiation, it briefly ionizes the gas and produces a detectable electric pulse, which is amplified and counted by a detector (before digital displays were available, you would hear clicks and see a needle register on a dial). Determine the formula for the half-life of a substance, H(M), with an initial count of N0 pulses and a count of N1 pulses M minutes later.4. I have two isotopes A and A' of an element with half-lives T/2 and Ti2 respectively. (a) Show that with time, the amount of A' relative to A is NA (t) f (t) = NA (t) = f (0) exp In (2) ( (b) The half-lives of 238U and 235U are 4.5 billion years and 700 million years, respectively. Natural uranium is currently about 97.3% 238U and 0.7% 235U. Based on the formula in (a), how long ago would you have been able to build an atomic bomb out of natural uranium ore, given that "weapons grade" uranium is at least 80% 235U? [MY]Time 0 t₁2 20₁2 3₁/12 Number of nuclides, N x 10³ 1000 750 500 90/2 10/₁2 250 125 0 12 212 312 412 512 612 7h2 8h2 9h12 10/2 Time in multiples of t₁/2 The figure shows a typical radioactive decay (amount of undecayed nucleus (N) vs. time (t)) from a heavy nucleus. Such a decay may be best expressed by an equation like : ON = N₂ (xt) ON=N₂/λt -λt ON = N₂e N = N₂ e-1/At N 1,000,000 500,000 250,000 125,000 62,500 31,250 15,625 7,813 3,906 1,953 977 412 5/₁/2 61₁2 7h2 81/2
- An 8 g sample of a radioactive element takes 8.42 million years to reduce into 2 g. Calculate the half-life and identify the element.2H is a loosely bound isotope of hydrogen, called deuterium or heavy hydrogen. It is stable but relatively rare — it form only 0.015% of natural hydrogen. Note that deuterium has Z = N, which should tend to make it more tightly bound, but both are odd numbers. Calculate BE/A, the binding energy per nucleon, for 2H in megaelecton volts per nucleon.56 (5) Fe has a mass defect of 0.58872 amu. What is its binding energy per nueleon? 26 (6) For the nuclear reaction 14 4. 17 N. +. He -> H. Calculate the energy in joules associated with the reaction of one atom of nitrogen-14 with one atom of He-4, given that the isotopic masses in amu are: N-14 (14.00307); He-4 (4.00260); O-17 (16.99991); and H-1 (1.007825).
- What fraction f1 of a radioactive sample will be left after 6 half‑lives? What fraction f2 of a radioactive sample will be left after 7.5 half‑lives?I need the answer as soon as possibleArcheologists can determine the age of artifacts made ofwood or bone by measuring the amount of the radioactive iso-tope ¹⁴C present in the object. The amount of isotope decreasesin a first-order process. If 15.5% of the original amount of ¹⁴C is present in a wooden tool at the time of analysis, what is theage of the tool? The half-life of ¹⁴C is 5730 yr.