50. Selenium-82 undergoes double beta decay: Se - Kr + 2 je¯ + 27 This low-probability process occurs with a half-life of 3.5 x 1027 s, one of the longest half-lives ever measured. Estimate the activity in an 82.0-g (1.00 mol) sample of this isotope. How many 82Se nuclei decay in a day?

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A: In alpha decay atomic mass decreased by 4 while atomic number decreased by 2 ,it is also known as…

Q: Co-60 is used extensively in radiotherapy as a source of y-rays. Its half life is 5.27years. a) How…

A: half life = 5.27 years

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A: Given , half life of U-235 = 703 million years. We need to find the time at which the amount of…

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Q: * S -75 Some Radioactive Isotopes Useful in Medical Imaging Mode of Isotope Decay Half-life Use in…

A:

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

A:

Q: 25. Iodine-131 is a radioactive substance that can be used to treat certain thyroid conditions. It…

A: Q25) Given that: Half life = 8 days Mass of Iodine = 40 mg Remain after 4 half lives = ?

Q: activity of 40 uCi. Calculate the number of nuclei that will decay in the time interval from t; =10…

A:

Q: For a radioisotope where k=1.5x10-4yr-1, how old is a sample when only 10% remains? 15,000 years…

A: The details solution for this is provided below in attach image.

Q: 25. How long would it take for 2.8 micrograms of a 10.4 microgram sample of Pa-231 to decay? The…

A: A multiple choice question based on half-life period, which is to be accomplished.

Q: 1. p + H + 87 2. He + ip 3. Mg + Si + 87

A: In this reaction 1 is nucleosynthesis  2nd is 3rd are steller formation

Q: Bi-191 has a half-life of only about 12 seconds. A large radioactive sample contains only 6.2 x 109…

A: Half life of Bi-191 = 12 sNumber of atoms of Bi-191 = 6.2 x 109 atomsNumber of moles of Bi-191 = ?…

Q: -33. The number of radioactive nuclides in a sample decays from 1.00 × 1020 to 2.50 × 10º in 10.0…

A:

Q: Fluorine-18 is a radioactive isotope commonly used in medicine.  It has a half-life of 110 minutes.…

A:

Q: How long for Ce-144 (half-life: 280 days) to decay down to 0.50% of its original amount?   2,100…

A:

Q: A sample of 11C has a half-life of 20.4 minutes. What is the Decay Constant of this sample? If the…

A: (1) For radioactive decay: Decay constant : λ=0.693t12=0.69320.4 minute-1 = 0.034 minute-1    (2)…

Q: You are studying a sample of granite that is about 2.1 billion years old. You know it contains some…

A: Here granite containing uranium -235 is formed 2.1 billion years old. We have to determine the…

Q: A rock constains Pb-206 to U-238 mass ratio of 0.245: 1.00. Assuming the rock did not contain any…

A:

Q: Copper-64 decays via positron emission with a half-life of 12.8 hours. Please write out the balanced…

A: Positron emission The positron emission process is a conversion of 1 proton into 1 neutron. The…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 4.4 g remain. What is the original…

A: The Answer to the following question is-

Q: Bi-191 has a half-life of only about 12 seconds. A large radioactive sample contains only 4.1 x 109…

A: Half life of Bi-191 = 12 sNumber of atoms of Bi-191 = 4.1 × 109 atomsNumber of moles of Bi-191 = ?…

Q: Be sure to answer all parts. A freshly isolated sample of 90Y was found to have an activity of 6.6 x…

A: Given : A1 = 6.6 ×105 per minute A2 = 1.8 × 104 per minute   Find : To calculate The half-life  is…

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A:

Q: Part B Cobalt-60 is a radioactive isotope that is commonly used for cancer radiation therapy. The…

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Q: he half-life of radioactive Bk-248 is 23.7 h.   How long does it tak

A: Radioactive decay follows the first order kinetics  its decay constant   λ = 2.303t log NoNwhere…

Q: The half-life of the radioisotope 63 Eu 158 is 1.0 hour. How many hours will the decay of 160-g…

A: Half life of first order reaction is independent of initial concentration

Q: QUESTION 7 A radioactive isotope, Z-109, has a half-life of 62.3 years. How many years (y) will it…

A: First of all by using half life period, we can calculate the the rate constant k and then by using…

Q: 11047Ag → 0.je + 110 48Cd For the nuclear reaction Starting with 200. g of Ag-110 in a container,…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer the…

Q: Cobalt-60 is used extensively in medicine as a source of g-rays. Its half-life is 5.27 years. How…

A: Given Half life ( t1/2 )   = 5.27 year  Initial Activity ( A0 )  = 100 %  Remaining amount ( At ) =…

Q: In the next step of the neptunium-237 decay series, very unstable francium-221 is produced.  Given…

A: We know that the radioactive decay follow first order reaction.

Q: How old is a rock if the mineral biotite from the rock has 75,000 40K atoms and 25,000 40Ar atoms?…

A:

Q: Cobalt-60 is used extensively in medicine as a source of g-rays. Its half-life is 3.97 years. How…

A: Given: Half-life of Co-60 = 3.97 years = 3.97 × 365 = 1449.05 days…

Q: an archaeologist graduate student found a leg bone of a large animal during the building of a new…

A: Given that, Decay rate = 15.30 disintegration Half life = 5730 years Since, disintegration follow…

Q: The following isotopes (listed with their half-lives) have been used in the medical and biological…

A: Activity of any radioactive reactant is given by  Activity = number of particles X decay rate…

Q: a. Write the balanced nuclear equation for the alpha decay of Neodymium-144. Write the atomic…

A:

Q: phosphorus-32 is a radioactive isotope with a half-life of 14.3 days.14.3 days. If you currently…

A:

Q: ty due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from…

A: Answer: the half life carbon -14 is = 5.73 × 103 years.  Activity of the sample in initial( Ao)=…

Q: -137, a beta emitter has a half-life of 30 vears

A: Dear student I have given answer to your question in the image format.

Q: The radioactive isotope phosphorus-32 is often used in biochemical research. Its half-life is 14.28…

A: Given: The half-life of phosphorus-32 is 14.28 days. The mass of sample of K332PO4 is 118 mg.

Q: 4. Complete each of the following nuclear equations AHe 2 56 Mn + 59 Co ? + 27 a.

A:

Q: What kind of nuclear radiation is this? 65 65 0 952 Ky → 9³L + e 32 33 -1

A: Here we are required to find the kind of nuclear radiation .

Q: Radium-226 (atomic mass - 226.03), the only naturally occurring isotope of this element, follows the…

A: Since the half-life of the 2nd and 3rd decay are very small in comparison to the 1st one, the 2nd…

Q: In a nuclear reactor, the excess neutrons produced from fission are absorbed by elements, preferably…

A: Those materials can be used to absorb neutrons in a nuclear reactor which will form most stable…

Q: c. What mass of Cs will be left in a 24.0 g sample of Cs after 90 years? d. What fraction of Cs-137…

A:

Q: Americium-241 (241Am) is a synthetic isotope used in smoke detectors. It undergoes alpha decay to…

A: Given: Half-life of isotope = 432.2 years. Initial mass of isotope = 0.30 µg And time passed = 70…

Q: Complete the following nuclear reactions and identify the cosmic phase (big bang nucleosynthesis…

A:

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.