Two sources of delayed neutrons in 235U fission are- the fission fragments 8Br and 137I. Find the fraction of their decays that yield a neutron, and the half-life of each. Verify that the Q-value for the B-decay with neutron emission is positive.

Q: a. Two or more nuclei combine to form one larger nucleus in the process of nuclear_ i) fission, ii)…

A: We need to fill answers for the given short questions.

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Q: Enter your answer in the provided box. Strontium–90 is one of the products of the fission of…

A: Given-> Half life = 28.1 year Initial amount = 4.00 gm Final amount = 0.100 gm

Q: A patient is given 0.050 ug of technetium-99m, a radioactive isotope with a half-life of about 6.0…

A: Given: Mass of technetium-99m = 0.050μg half life= 6.0 h Mass of technetium to decay= 1.0×10-3μg

Q: What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 57.1 h?

A: The half-life of the isotopes can be described as the time at which the amount of the activity…

Q: NUCLEAR REACTIONS Nickel-56 decays with a half-life of 6.075 days. 1. Write the balanced nuclear…

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Q: A certain artifact is tested by carbon dating and found to contain 73% of its original carbon-14. As…

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Q: 8. Radioactive Iodine-131, with a half-life of eight days, is a common fission product and thus is…

A: The expression for the first order radioactive decay is shown below: Where; t = time A0 = initial…

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A: Given t= 28.8 years. t1/2 = ?

Q: days. show solution 1. Write the balanced nuclear reaction of Ni-56 as it undergoes positron…

A: Given, Half life (t1/2) = 6.075 days 1. Balanced nuclear reaction  28Ni56 --‐-> +1e0 + 27CO56 2.…

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

A: Since no 87Sr was present when the rock was formed. hence whatever moles of  87Sr is formed can from…

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: 13) The half-life of C-14 is 5730 years and the decay is 1 order. If you start with 500 mg if this…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: Consider the I-131 nucleus that is used to treat thyroid. Mass of I-131 is 130.78302 amu. 1) what is…

A: To answer questions regarding I-131 nucleus.

Q: What is the half-life of an isotope that decays to 3.125% of its original activity in 63.6 h?…

A: We know that,  N(t) = N0(1/2)t/t1/2 No = initial amount  N(t) = amount of substance at time t t1/2 =…

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Q: NUCLEAR REACTIONS Nickel-56 decays with a half-life of 6.075 days. 1. Write the balanced nuclear…

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Q: 1. (a) Determine the relative probability that fission reaction will occur in absorption by 20%…

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A: Since the decay reactions are first order. Hence half life = ln(2) / K  where K = decay constant…

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

A: In general, the radioactive decay follows first-order kinetics. For the first-order reaction, the…

Q: Determine the change in energy (in kJ/mol) of the given nuclear fission reaction. 239 Pu + on - 134…

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Q: One of the nuclides in spent nuclear fuel is UU-235, an alpha emitter with a half-life of 703…

A: The half-life of U-235 is = 703 million years The time to reach the amount of U-235 to 1/4 of its…

Q: Determine the change in energy (in kJ/mol) of the given nuclear fission reaction. 239 4 Pu + in →…

A: We have to calculate the change in energy.

Q: ubidium-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: 22) Iodine-123, used in thyroid therapy, has a half-life of 13.27 hours. Iodine-123 decays via a…

A: Given data:  Iodine-123 used in thyroid therapy ,has a half -life =13.27 hours  Iodine -123 decay…

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

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Q: Cesium 137 is a commonly used isotope in the treatment of some cancers, someone you know may have…

A: The reactant given is Cesium 137 i.e 13755Cs.

Q: The radioactive isotope 212Pb has a half-life of 10.64 h. A sample containing this isotope has an…

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Q: Strontium-90, a beta emitter, has a half-life of 28.1 years. a. Write the balanced nuclear equation…

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Q: 4. The remnants of an ancient fire in a cave in Africa showed a 'C decay rate of 3.9 counts per…

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A: As per the rules, only three sub-parts can be answered:

Q: A 25-g sample of a pure radioisotope decayed until approximately 1 gram remains. If it took 245 days…

A: Given, A 25-g sample of a pure radioisotope decayed until approximately 1 gram remains. If it took…

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: A certain artifact is tested by carbon dating and found to contain 73% of its original carbon-14. As…

A: Given : Concentration of carbon present = 73 % of initial concentration  And concentration of radium…

Q: The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10 hours.…

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Q: The half-life of a particular radioactive isotope X is 10.0 days. (1) Determine its decay constant.…

A: half life = 10.0 days.

Q: One of the nuclides in spent nuclear fuel is U−234U−234, an alpha emitter with a half-life of…

A: Welcome to bartleby !  We have to calculate time (years)