45. The half-life of l®F is 109.7 minutes. If radiolabeled Prozac were administered to a patient for a PET scan at 8:00 A.M. on Monday, at what time would its activity reach 10% of the original activity? а. 9:49 A.М., Мonday b. 9:07 P.M., Friday 10:42 A.M., Tuesday d. 2:04 P.M., Monday e. 6:07 P.M., Monday с.

Q: Technetium-99m, a metastable state of technetium-99 commonly used in nuclear medicine, has a…

A:

Q: A. time for amount of radionuclide to decrease to 1/16 of initial amount radionuclide initial…

A:

Q: After 4.00 years, 2,000g of a radioisotopes remains from a sample that had and original mass of…

A: There is some mistake in 1st part  If the left amount is 2.0g then half-life is itself 4 years

Q: A freshly isolated sample of 90Y was found to have an activity of 8.5 x 105 disintegrations per…

A:

Q: Zinc-62 decays with a half-life of 9.186 hours. After 12.80 days, a radioactive nuclide has passed…

A:

Q: A bone has a carbon-14 decay rate of 4.85 disintegrations per minute per gram of carbon. If a living…

A: Given : Decay rate of carbon-14 in bone = 4.85 disintegration per minute per gram of carbon Decay…

Q: Nickel-56 decays with a half-life of 6.075 days. After 5.69 hours, a radioactive nuclide has passed…

A:

Q: Calculate the half-life of a radioisotope if it takes 72 years for a sample to decay to 12.5% of its…

A: 100 % to 50 % one t1/2. 50 % to 25 %  second t1/2. 25% to 12.5 third t1/2. three t1/2 = 72 years.…

Q: A freshly purified 2.00 g sample of the alpha particle emitting radionuclide 244 Am is prepared then…

A: Mass of radionuclide = 2.00 gVolume of evacuated container = 0.100 LTemperature = 25 °CPressure =…

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

A:

Q: An ancient skull has a carbon-14 decay rate of 0.85 disintegrations per minute per gram carbon (0.85…

A: The half life for a radioactive element can be defined as the time taken by the half of the material…

Q: After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the half-life…

A: Amount of radioisotopes remaining = 112 of the initial amount Number of days taken for the decay =…

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

A: The half-life (t1/2) of Nitrogen-13 is provided as 10 minutes.

Q: Be sure to answer all parts. A freshly isolated sample of 90y was found to have an activity of 9.7 x…

A:

Q: Iodine-125 (125I) is used to treat, among other things, brain tumors and prostate cancer. It decays…

A:

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…

Q: sample

A: We will calculate t1/2 by the help of given information

Q: A radioisotope has a half-life of 8.7 h. What mass of the radioisotope will be left after 24.5 h if…

A: The objective of the question is to find out the the mass of radioisotope left after 24.5 h.

Q: A freshly isolated sample of 90Y was found to have an activity of 7.6 × 105 disintegrations per…

A:

Q: Chemistry The 35S atom on a radiolabeled amino acid, methionine, has a half-life of 87.4 days. What…

A: In a radioactive element, the decay of the nucleus of the element takes place due to the imbalance…

Q: Fluorine-18, which is often used in PET scans to locate tumors, decays to form a positron and…

A: The kinetics which hold direct proportional relation between rate and reactant amount existing at…

Q: A freshly isolated sample of 0Y was found to have an activity of 8.9 × 105 disintegrations per…

A: Given: Initial activity of isotope = 8.9 × 105 disintegrations per minute. Final activity of isotope…

Q: After 119 days have elapse 1/21 of a radioisotope sample remains undecayed. What is the half-life of…

A: Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A…

Q: A freshly isolated sample of 90Y was found to have an activity of 2.5 ×105 disintegrations per…

A: Given, A freshly isolated sample of 90Y was found to have an activity of 2.5 ×105 disintegrations…

Q: 5.) A sample of bone has a specific activity of 5.22 disintegrations per minute per gram of carbon…

A: Given:

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A: Radioactive decays follow first order kinetics.

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. How long would it take a sample to decay…

A: Given- Half life=5.26 years  Initial amount=1.90mg Final amount=1.50mg

Q: 44 of 48 If the half-life of a radioisotope is 3 years, the radioactivity remaining in a sample of…

A: (a) the half life is 3 year, Now, amount of sample remaining after 6 years is, 6 years means 2 half…

Q: After 19 days have elapsed, 1/21 of a radioisotope sample remains undecayed. What is the half-life…

A:

Q: Fluorine-18 decays to form a positron and oxygen-18. After 90.0 minutes, 1.00 18O is present…

A:

Q: A 50.0 mg sample of an unknown radioactive substance was placed in storage and its mass measured…

A:

Q: Carbon-10 is an unstable isotope with an atomic mass of 10.016853 u. It undergoes beta-plus decay…

A: The total binding energy of an atom is the sum of energy that is emitted as the atom is created by…

Q: Carbon-14 occurs in living organisms with a fixed ratio to nonradioactive carbon-12. After a plant…

A: Radioactive decay follows first order kinetics.  We know that : k = 0.693/t0.5 ...(1)  Here, t0.5 =…

Q: On April 26, 1986, an explosion at the nuclear power plant at Chernobyl Ukraine, released the…

A:

Q: radioisotope tracer has a half-life of 1.5 minutes. If a level of <1% is considered safe, when would…

A: Half life of a radioactive isotope is the amount of time it takes for one half of the radioactive…

Q: The cloth shroud from around a mummy is found to have a 14C14C activity of 8.7 disintegrations per…

A: Calculation of age of shroud using Carbon Dating method :

Q: A freshly isolated sample of "Y was found to have an activity of 7.3 x 10° disintegrations per…

A: Initial activity = 7.3 × 105 dps Final activity = 1.9 × 104 dps Time = 14 day + 1 hour + 15 minutes…

Q: If a tree dies and the trunk remains undisturbed for 1.635 × 10⁴ years, what percentage of the…

A: Given, time t = 1.6 x 104 years , half life t1/2 = 5730 years

Q: he half-life of chromium-51 is 28 days. If the sample contained 510 grams, how much chromium would…

A: Given that

Q: A freshly isolated sample of 0Y was found to have an activity of 7.7 x 105 disintegrations per…

A: All nuclear reactions follow first order kinetics. For first order reaction- ln (At/Ai) = -kt At:…

Q: A 10.00-g plant fossil from an archaeological site is found to have a 14C activity of 3094…

A:

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

A: The half-life of a reaction is the time taken for the reactant to reduce to half its initial value…

Q: Thoron has a high average annual radiation dose according to the graph. Iti eavy radioisotope formed…

A: No

Q: After 119 days have elapsed, 1/21 of a radioisotope sample remains undecayed. What is the half-life…

A: Suppose the initial amount of sample be Ao After 119 days, amount remaining, A = (1/21) Ao The…

Q: SW Science 10 Unit 5 Radioactive Decay Worksheet Name:asmin laward th Student #: 5.2.1 Radioactive…

A:

Q: disintegrations per minute per gram of carbon.     Part A From the half-life for 14C decay, 5715 yr…

A: Given data, For 14C Nt = 9.8 /min No = 16.3/min t1/2 = 5715 yrs

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: A bone has a carbon-14 decay rate of 4.98 disintegrations per minute per gram of carbon. If a living…

A: Solution : N0= 4.98 dpm N(t) = 15.3 dpm  t1/2 = 5715 years  t = ?

Q: radionuclide time for amount of initial radioactivity radionuclide to decrease to 1/4 of initial…

A: