. If the half-life of a radioisotope is 3

Q: A 16.0 g sample of technicium-99m has a half-life of 6.0 hours. How much sample remains 24 hours…

A: As per the given information in the question, First calculate the rate constant (K) of the…

Q: The half-life of Phosphorus-32 is 14.3 days. If you start with 100 grams of it, how long will it…

A: Half life of a first order reaction is given by , t1/2=0.693k Write the expression for first order…

Q: What is the half-life of a radioactive substance if after 5 years 95 percent of an initial amount…

A: Half life of a given radioactive substance is that time duration in which it's amount reduced half…

Q: The half-life of Lithium-8 (Li-8) is 0.84 seconds. If 400 grams of Li-8 were released to the…

A:

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

A: Elements which are not stable gain stability by emitting rays, this type of elements are called…

Q: The half-life of strontium-90 is 28 years. H

A: Given t1/2 of a reaction is 28 years  decay constant  (λ) λ = 0.693t1/2     = 0.69328 y     =…

Q: Iron-59 is commonly used as a source of B particles. How long does it take for 87.5% of a sample of…

A: Radio active decay is an example of 1st order reaction. and for 1st order reaction the rate law is…

Q: Thorium, a rare element in the earth's crust, has over seven radioactive isotopes. Of of these Th…

A: The rate of the reaction is referred to the change in the molar concentration in the distinct…

Q: The half-life of selenium-83 is 22.3 min. If a sample contains 24.0g of selenium-83, how long will…

A:

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Formula for radioactive decay is given as,

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Half life of technetium - 99 is = 6 hours.  Let Take a sample of technetium - 99 having number of…

Q: Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60…

A: The half life of cobalt-60 is = 5.3 year The fraction of cobalt-60 atoms will remain in a particular…

Q: The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25…

A: We have given that The beta decay of cesium-137 has a half-life of 30.0 years. How many years must…

Q: If 7.0 grams of a sample decays to 0.44 grams in 2.0 hours, what is the half-life time of the…

A: For calculation of half life first of all we need rate constant of the reaction, which can be…

Q: Tritium, which is , has a half-life of 12.3 years. Calculate the amount of time it would take for…

A:

Q: Radioactive Decay The half-life of radium-226 is 1590 years. (a) If a sample has a mass of 150 mg,…

A: Radioactive decays follow first order kinetics. k=0.693t1/2 Calculate k. k=0.6931590 years…

Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is…

A: Detail mathematical calculation is shown below

Q: A certain radioisotope has a half-life of 6.58 days. What percentage of an initial sample of this…

A:

Q: The half-life of Palladium-100 is 4 days. After 24 days a sample of Palladium-100 has been reduced…

A: N  = N0 e-λt  N0  = Initial mass of the sample N = Mass of the sample after a time 't' λ = decay…

Q: II 24 Iours, what is the half-life of Ra-226 in years? 27 3. Arsenic - 70 has a half life of 140…

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next…

Q: The half-life of cobalt-60 is 5.27 yr. How much of a 1.000-mg sample of cobalt-60 is left after…

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Q: Technetium‑99m, an important radionuclide in medicine, has a half‑life of 6.0 hours. What percentage…

A: Using concept of half life time.

Q: The​ half-life of​ silicon-32 is 710 years. If 20 grams is present​ now, how much will be present…

A: Radioactive decay is always a first order reaction. The rate equation for the radioactive decay is :…

Q: At a given time, there are 1.2 mg of a radioactive substance present. After 6 hours there is only…

A: To solve this question, first find out the rate constant of radioactive substance and using that…

Q: The half-life of radiogold is approximately 3 days. If 1.5 g of this has been administered to a…

A:

Q: 8. A radioisotope is going to be used in an experiment. At the end of 10 days, only 5% is to be…

A:

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

A:

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: The initial mass of the sample of palladium-100, No, in mg is calculated as shown below where t1/2…

Q: An unknown radioactive element decays into non-radioactive substances. In 340 days the radioactivity…

A:

Q: The half-life of tritium is 12.4 years. How long will it take for 15% of a sample of tritium to…

A: The radioactive decays are first order reaction.

Q: A radioactive isotope emits 999 disintegrations per minute due to beta decay. If after 1.01 years…

A: Since the relationship between activity and time is given by  A0 e-λt = A where A = activity after t…

Q: If a rock sample was found to contain 4.30 x 10-7 mol of argon-40, how much potassium-40 would also…

A: Nuclear disintegration follows first order kinetics  λ=2.303 log(A0/A)/t  λ=0.693/t1/2 or 0.693/t1/2…

Q: 21. Half-Life The half-life of radium-226 is approximately 1620 years. a. How much of a sample…

A: Introduction: We know that this decay of radioactive elements is a type of first-order reaction. The…

Q: unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms, how…

A: Given- Number of initial atom =3500 atoms Number of final atom =125 atoms  Half life =700 million…

Q: Plutonium-239 has a half life of 2.41x10* yr. If you have a 10.0 mg sample how much will remain…

A: The time where any substance/element gets remained just half of its actual quantity is considered as…

Q: The half-life for P-32, a radionuclide used in DNA sequencing, is 14.28 days. Calculate the…

A: All natural and artificial radioactive decays follows first order kinetics The integrated rate…

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A:

Q: After 4.00 years a 2.0 g sample of a radioisotope remains from a sample that had an original mass of…

A:

Q: n unknown radioactive element decays into non-radioactive substances. In 440440 days the…

A: a) Given :-  Given that, in 440 days the radioactivity of a sample decreases by 37 percent.  i.e.…

Q: . If Gallium-68 has a half-life of 1.13 hours, how much of a 10.0 mg sample is left after 5.69…

A: 1.  given :-  initial amount of sample = 10.0 mg  half life of Gallium-68 (t1/2) = 1.13 hours  To…

Q: If 1.50 gram of a 2.00 gram sample of a radioactive substance undergoes decay in 60 minutes, then…

A:

Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

A: Given: The half-Life of lead= 37 min Initial Concentration of lead [A]0= 68.0 mg Final Concentration…

Q: Radium has a half-life of 1600 years. How many years does it take for 90% of a given amount of…

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Q: How long will it take a radioactive sample of iodine-131 (half-life 8.07 d) to lose

A: The spontaneous disintegration of alpha, beta and gamma radiations by a substance irrespective of…

Q: Iron-59 has a physical half-life of 45 days. If 96 g of a radioactive iron sample (59Fe) is received…

A:

Q: The isotope Np-238 has a half life of 2.0 days. If 96 grams of it were present on Monday, how much…

A: Here given, The half-life of Np-238 (t1/2)= 2 days. Initial amount present (N0) = 96 g Time (t) = 6…

Q: 5. Strontium-90 has a half life of 28.8 years. If you start with a 10 gram sample of Strontium-90,…

A: We have to predict the amount after 115.2 years.

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.