Measurements on a certain isotope tell you that the decay rate decreases from 8318 decays/min to 3091 decays/min in 4.00 days. What is the half-life of this isotope?

Q: 6A. Choose the correct daughter isotope to complete the alpha decay equation below. The nuclear…

A: Step 1: Given, parent nucleus is radium (Ra) isotope with mass number 219 and atomic number 88.we…

Q: Plutonium-239 has a half life of 24100 yr. Starting with a sample of pure 239 Pu, how long would it…

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Q: The activity of a radioactive isotope is 16000 disintegrations/sec. The activity drops to…

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Q: A 44.5 g sample of carbon has an activity of 8.55 decays per second. How old is it? Please give your…

A: Given data The mass of the sample of carbon is given as m = 44.5 kg.  The number of decays is given…

Q: The material that formed the earth was created in a supernova explosion approximately 6 billion…

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Q: A radioactive isotope decays at a rate proportional to the amount present at time t and has a…

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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

Q: A sample of 18F is used internally as a medical diagnostic tool by observing this isotope’s positron…

A: Given information: The t1/2 of the F18 isotope's positron decay, t1/2=110 min  The percentage of…

Q: A freshly prepared sample of a certain radioactive isotope has an activity of 3,7 × 1011 decays/s.…

A: Given quantities: initial activity of the isotope (A0) = 3.7 × 1011 decays/s activity of the isotope…

Q: A certain isotope has a half-life of 9.82 h. What is its decay constant in s-1?

A: Given, The half-life of an isotope, t12 = 9.82 hr

Q: When Po decays, the product is Pb. The half-life of this decay process is 1.78 ms. If the initial…

A: Determine the decay constant as follows. λ=0.693t12=0.6931.78 ms=0.6931.78×10-3 s=389.3258 s-1

Q: The decay constant of a radioactive source is 752 per year. Then its half- life equals: *

A: Step:1   The  Time  taken  for a radioactive atom    to  disintegrate  to half  of its  original…

Q: Yttrium-90 is the daughter nucleus of an isotope that is a major waste product of nuclear reactions.…

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Q: Use the binding energy per nucleon curve in the figure above to determine how much energy must be…

A: The binding energy is equal to the amount of energy released in forming the nucleus or amount of…

Q: How much energy is released in the following fission process? 23592U + n→ 14156Ba +⁹236Kr+ 3n The…

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Q: Iodine ( A= 131, Z= 53 ) undergoes a β- decay. What is the resulting daughter nuclide?

A: Parent nuclide : Iodine A = 131 Z = 53 Decay mode = beta negative decay

Q: Derive an approximate relationship between the energy of α decay and half-life using the following…

A: Given,

Q: Generally, more massive nuclides tend to be more unstable to alpha decay. For example, the most…

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Q: Problem 9:  235U is the rarer of the two most common uranium isotopes. Most uranium is 238U.…

A: a)

Q: An ancient club is found that contains 140 g of pure carbon and has an activity of 4 decays per…

A: Given Mass of carbon in ancient club = 140 gm Carbon activity = 4 decays /sec Living trees ratio of…

Q: In the 1986 disaster at the Chernobyl reactor in eastern Europe, about 1 8 of the 137 Cs present in…

A: It is a measure of radiation dose to tissue. It is less fundamental than absorbed dose, but has…

Q: Uranium-235 (2U) undergoes a series of alpha and beta decays in this succession: a, 2B, 5a, 2B, and…

A: Alpha Decay Alpha particle contains two protons and two neutrons, after an alpha emission the parent…

Q: A radioactive material has a decay constant of λ = 0.0586 yr-1. If it starts out with N0 = 9.03 ×…

A: Given: Decay constant : λ=0.0586 yr-1 N0=9.03×1018 t = 407 years To find N left after given t years.

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: The half life of 60CO is 5.7 years. Find the activity of 3.54 milligram of 60Co. Give your answer in…

A: Answer is (1.37 x 1011  )decay /second (Bq). Explanation is in next step.

Q: If an atoms with 62 protons undergoes β-decay, the daughter nuclide will have ____ protons.\

A: A beta decay is a radioactive decay, during which a neutron inside the nucleus of an atom…

Q: Half life of a radioactive isotope is 4x108 years. If there are 10³ radioactive nudei in a sample…

A: Given : Half life of the radioactive isotope, t1/2 = 4×108 years Current number of radioactive…

Q: A 200.0 - mCi sample of a radioactive isotope is purchased by a medical supply house. If the sample…

A: The time taken for the activity reduced to 20.0 mCi.

Q: If it is known that 87% of an initial radioactive sample remains after 3 days, what is the decay…

A: Given: The amount of radioactive decay is 87% of the initial amount. The time is 3 days.

Q: Ten deuterium nuclei (2.0141 amu each) fuse to give alpha particles (4.0026 amu). Calculate the…

A: Deuterium mass m1 =2.0141 amu Alpha particle mass m2 =4.0026 amu 10 21H -------> 5 42He

Q: The radioactive isotope Pt-188 decays into a stable nuclide after a series of 4 separate decays. The…

A: Eu63144  undergoes alpha, alpha, +beta,+beta decay...