For a radioactive sample with a half-life of about 88 days, storage in a lead lined cabinet for a sufficient length of time assures it will be safe before disposal. A radioactive sample is considered to be safe after 9 half-lives have expired. What percentage of the original radioactivity of the sample remains after this many half- lives? Report answer as a percentage, but do not include the percent symbol. Provide 3 significant digits of precision.

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. Calculate the activity of a 9.7 mg…

A: Given mass of sample = 9.7mg = 0.0097g  Molar mass of Cobalt-60 = 60g/mol  Half life of reaction =…

Q: Krypton-79 has a half-life of 34.50 h. After 138.0 h, 54.25 kg of this radioistope is left. How much…

A: Given, the half-life of Krypton-79 is 34.50 hthe amount of radioisotop left after 138.0 h is 54.25…

Q: A hospital patient receives a dose of Technicium-99m with a mass of 0.050mg. Given that the…

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Q: Write a set of nuclear equations to represent the series of decays that transforms Ra-228 into…

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Q: A 76 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

A: Given : Half life=12 hr Initial amount, [A]o=76 mg The final amount, [A]=? Time, t=3.5 days= 3.5 x…

Q: If 1.0000 mg of nuclide undergoes alpha decay consistent with curve (b), how many milligrams remain…

A: The point where time = 6 vertical line and curve b meets, will be the point for quantity of isotope…

Q: A 1.00 g sample of a radioactive isotope decays such that 0.675 g will remain after 5.43 yr.…

A: The initial amount of the sample The amount left at time t, [A] = 0.675 gTime (t) = 5.43 yearsHalf…

Q: Write a balanced equation for beta decay of indium-113. Express your answer as a nuclear equation.

A: Beta decay indicates beta particles are released during disintegration.

Q: Identical amounts of two different nuclides, an alpha emitter and a gamma emitter, with roughly…

A: Identical amounts of two different nuclides, an alpha emitter and a gamma emitter, with roughly…

Q: Fill-in the following table for the decay of a particular radioisotope.

A: N (t1/2 ) passed  Total time passed ( in min ) Mass remaining in (g) 0  0 64 1 14 min 32 2 28…

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. Calculate the activity of a 2.8 mg…

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Q: Identify the unknown particle X in the following nuclear reaction equations. (Enter your answers in…

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Q: Explain why the age of a sample of a radioisotope is important to understanding its activity. Use an…

A: age of a sample of a radioisotope is important to understanding its activity because, radioactive…

Q: Balance the nuclear reaction. Supply 1 symbol and 2 numbers. 146 142 B Sm → Nd + A 62 60 C A = Blank…

A: The given nuclear reaction is: Sm62146→Nd60142 The nuclear reaction is balanced by balancing the…

Q: 7) Please circle any of the following nuclides are most likely to decay via electron capture: (Yes,…

A: The answer for the above question are as: Explanation:Electron Capture:Electron capture occurs when…

Q: What are 15 unique facts about nuclear fusion with thorough explanation

A: The two important classes of nuclear reactions are nuclear fission and nuclear fusion.

Q: Skittles "S" Down Skittles "S" Down Skittleso "S" Up (Parent Atoms) (Daughter Atoms) for each Trial…

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Q: At 7:00 A.M., a patient receives a 1.40-mg dose of I-131 to treat thyroid cancer. Part A If the…

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Q: If a 50.42 mg sample of a pure radioisotope has a half-life of 38 days, what will be the mass of the…

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Q: A piece of wood from an ancient artifact has a carbon-14 activity of 11.7 disintegrations per min.…

A: Decay reactions are first order reactions. Since we know that the relationship between the activity…

Q: How much time is required in days for a 6.25 mg sample of Cr-51 to decay to 1.75 mg if it has a…

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Q: Using general trends, predict the stability of the following nuclei. Drag the appropriate items to…

A: To check the stable or unstable nuclei, we would calculate the number or protons and neutrons in…

Q: It was determined experimentally that 76% of a certain quantity of a radioactive isotope has…

A: Radia active decay is a first order reaction. The rate of decay is proportional to the concentration…

Q: Complete the following nuclear equation by identifying X. (Enter the complete nuclear equation.) 26…

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Q: If the initial sample is  1.25 g,  what mass of the original iridium‑192 remains after  65  days?…

A: Mass of sample =1.25 g Time, t = 65 days Mass remained = 0.675 g

Q: Many elements have been synthesized by bombarding relatively heavy at particle accelerators.…

A: Answer:- This question is answered by using the simple concept of nuclear reactions in which the…

Q: a. Write the nuclear equation for this deçay in full isotopic notation. You must fill ALL 9 blanks…

A: Nuclear chemistry is branch of chemistry in which we deal with nuclear fusion and fission process.

Q: Fill in the nuclide symbol for the missing particle in the following nuclear equation.

A: Given, the products 21484Po.

Q: A 1.00 g sample of a radioactive isotope decays such that 0.675 g will remain after 2.43 yr.…

A: Radioactive decay follows the first order kinetics.k = (2.303/t) log (Ao/A)t1/2 = 0.693/kWhere, Ao =…

Q: Suppose an object receives 2340 millirem of radiation when it is 10 meters from the source,…

A: The intensity of radioactivity is inversely proportional to the square of distance it means on…

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: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: This problem is based on Radioactivity or nuclear chemistry. Which is a subtopic of Chemical…

Q: Predicting the decay mode Based on the valley of stability, the following processes generally tend…

A: To check the mode of decay we need to determine the number or protons and neutrons . Then we would…

Q: A 1.00 g sample of a radioactive isotope decays such that 0.675 g will remain after 5.54 yr.…

A: Radioactive decay follows the first order kinetics.k = (2.303/t) log (Ao/A)t1/2 = 0.693/kWhere, Ao =…

Q: If a sample started with 1 million radioactive isotopes (at time = 0), how many radioactive isotopes…

A: Radioactive decay always follows first order reaction kinetics. First half life of a first order…

Q: 9436Kr

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

Q: Use your observations (the symbols and process shown) to write a nuclear equation that describes…

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