The half-life of a radiotracer is 3 hr. (i) Determine the decay constant of the radiotracer, (ii) how long does it take for the radiotracer to decay from the initial radioactivity of 1 Ci to the final radioactivity of 1 mCi?

Q: Question 4. A synthetic radioisotope is freshly prepared in a lab that has an ac- ivity of 10.0 mCi.…

A: Given data as per question t    =   5.00 h A0  =   10.0mCi

Q: The lead isotope Pb-209 decays at a rate proportional to the amount present at time t and has a…

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Q: One of the many isotopes used in cancer treatment is 198 79 Au , with a half-life of 2.70 d.…

A: Given Isotope  19879Au Half life  2.7 d To find out The mass of this isotope that is required to…

Q: The decay constant of 235U is 9.8×10^−10 y^−1 . How many 235U atoms will remain in a 1.0 µg sample…

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Q: The activity of a sample of a radioisotope at some time is 10.5 mCi and 0.38 h later it is 7.50 mCi.…

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Q: If the parent nucleus in a ß* decay is CI, what is the daughter nucleus? 17 Help chemPad XX Greek:…

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Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…

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Q: X 26. MeV) for 'Be, for which the atomic mass is 9.01219 amu. Particle masses in amu are: proton =…

A: Given a Be nuclei with atomic mass= 9.01219 amu                                 mass of proton=…

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: Calculate (in MeV) the binding energy per nucleon for (a) 14N, (b) 56Fe, and (c) 207Pb.

A: The expression for the Binding energy, EB=Zmn+Nmn-matom931.49 MeV/u   The binding energy per…

Q: a) Write a balanced nuclear reaction for the alpha decay of 222Rn. b) The half-life of 222Rn is…

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Q: The air in some caves includes a significant amount of radon gas, which can lead to lung cancer if…

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Q: f you start at t = 0 a decay rate of r = 10,000 Cs -137 decays per second, how many decays per…

A: The half life of Cs-137 is 30.17 years t1/2 = 30.17 years = 30.17*365*24*60*60t1/2 =

Q: Calculate the total binding energy and the binding energy per nucleon for  (a) ⁵⁶Fe , (b) ²³⁸U .

A: In Fe56 no. of protons = 26 no. of neutrons = mass-no. of protons = 56-26=30 Total mass of 30…

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: 2. Find the average binding energy per nueleon for Bromine, Br (atomic mass= 78.918336 u). a) 8.69…

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Q: The activity of a sample of a radioisotope at some time is 10.7 mCi and 0.46 h later it is 7.10 mCi.…

A: Given that: The initial activity is N0=10.7 mCi The final activity is N=7.10mCi The time is t=0.46h…

Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…

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Q: What is the mass of 1ci of 227Th? If the half-life is 1.90 years.

A: T1/2 = 1.90 years        = 1.90 x 3.15 x 107 s λ = 0.693/T1/2    = 0.693/(1.90 x 3.15 x107s)

Q: Suppose a radioactive material, UPinium, was found under the chemistry building in 2000 (year). In…

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Q: The activity of a sample of a radioisotope at some time is 10.5 mCi and 0.46 h later it is 7.00 mCi.…

A: Initial activity of isotope is Ro = 10.5 mCi Activity after some time is R = 7.00 mCi Time elapsed…

Q: The half-life of tritium is 12yr. If the TFTR fusion reactor contains 50 m³ of tritium at a 3…

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Q: U235 has a decay constant of 3.138 × 10-17 s-1. Activity of 1 ug of the sample will be 80.386×10-3…

A: Unstable nuclei become stable by radiating energy. This process is called radioactivity. The rate at…

Q: As a health physicist, you are being consulted about a spill in a radiochemistry lab. The isotope…

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Q: The half-life of 222Rn is 3.82 days. (a) Convert the half-life to seconds. 330048 (b) Calculate the…

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Q: A radioisotope has a half-life of 5.00min and an initial decay rate of 8000 Bq. (1.) What will be…

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Q: A certain isotope has a half-life of 9.06 h. What is its decay constant in s-1?

A: Given: The half life time is 9.06 h.

Q: When 2041Ca ( Atomic Mass , 40.962278 u ) decays by electron capture, the disintegration energy is…

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Q: 90% of No radioactive atoms decay in one hour. What is the half-live? What is the decay constant…

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Q: A synthetic radioisotope is freshly prepared in a lab that has an activity of 10.0 mCi. If the…

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Q: What time interval elapses while 51.0% of the radioactivity of a sample of 7233As disappears, as…

A: As per given data, 51% of the radioactivity of a sample disappears.

Q: radioactive

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Q: A radioactive substance initially contains 20000 thorium Th230 isotype. How many of this radioactive…

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Q: an life of 7.2 days ay. Subsequently,

A: In general the radioactive elements decay into another radioactive element.  The first one is called…

Q: If you start at t = 0 a decay rate of r = 10,000 Cs -137 decays per second, how many decays per…

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Q: In a nuclear reactor accident, the 137Cs (?1/2 = 30.2 years) nuclide is among the most problematic…

A: Given : Description of a nuclear reactor using 137Cs.

Q: A 40 grams in radionuclide decays 35 grams in 240 years. What is the half-life of the radionuclide?

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Q: an element with initial mass 1 kg started radioactivity in 2021 , in which year the element will…

A: The mass is proportional to the radiation concentration. Which means that the radiation equation can…