The isotope 208Tl undergoes β decay with a half-life of 3.1 min.  How many minutes will it take for a 200 g sample to decay to 12.5 g?

Q: A radioactive isotope has a half life of 98.9 minutes. How long will it take for the radiation from…

A: Given , Half life = 98.9 minutes Initial concentration = 325 pCi Time ,t = ?

Q: The half-life of Ga-67 is 77 9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A: Given  Half life of Ga- 67 = 77.9 hours  decay % = 95 %  Time ( t ) = ?

Q: Barium-142 is an beta emitter with a half-life of 11.0 min. If we start with 2.500 g of 142Ba, what…

A: The number of half-lives (n) can be calculated as

Q: A sample of TI-201 has an initial decay rate of 5.88 x 10*/s. How long will it take for the decay…

A: Given:  Initial Rate= 5.88×104/s Rate to fall = 287/s Half life= 3.042 days

Q: How much time is required for a 6.25-mg sample of 51Cr to decay to 0.75 mg if it has a half-life of…

A: The initial amount of the sample = 6.25 mg The amount of sample after time t = 0.75 mg. The…

Q: The isotope 208Tl undergoes β decay with a half-life of 3.1 min.  What isotope is produced by the…

A: Nuclear reaction: A nuclear reaction must cause a transformation of at least one nuclide to another.…

Q: A sample of TI-201 has an initial decay rate of 5.88 x 10' dis/s. How long will it take for the…

A:

Q: A radioactive isotope has a half life of 17.4 minutes. How long will it take for the radiation from…

A: Half life is a time taken to half the concentration of the substance present. here , the radioactive…

Q: Cobalt 60 has half-life of 5.25 years. Given 1 mg of the substance, find  (b) the decay constant,…

A:

Q: If 2.8x10-10% of the atoms of a radioactive isotope disintegrate in 1.0 yr, what is the decay…

A: As the radioactive decay is first order reaction, the expression is given as, Here,  N0 indicates…

Q: Co-60 is used extensively in radiotherapy. Its half-life is 5.27 years. How many years will it take…

A:

Q: What is the half life of a radioactive sample , if 3/4 of its nuclei decay in 2 years ?

A: Given:The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass =…

Q: Plutonium-239 (t12 = 2.41 × 10* yr) represents a serious nuclear waste hazard. If seven half-lives…

A: Given  Number of Half lives  ( n ) = 7  Half life time  ( t1/2 )    = 2.41 × 104  year  Time ( t )…

Q: How many hours until the isotope decays to 1.56 x 10-3 mg?

A:

Q: 8. How long will it take for a sample of plutonium -239 with a half-life of 24000 years to decay to…

A: Given information : plutonium-239 Half life (t1/2) = 24,000 years Initial amount = Ao Final amount…

Q: The isotope 83212Bi has a half-life of 1.01 years. What mass (in mg) of a 2.00-mg sample will not…

A:

Q: What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 57.1 h?

A: The half-life of the isotopes can be described as the time at which the amount of the activity…

Q: The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes.…

A: As the iodine undergo radioactive decay , it obey first order reaction . By using the half life…

Q: 137 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Given half life = 30.2 years initial Concentration = 100 g Concentration at time t = 0.900 g

Q: The isotope ²¹²₈₃Bi has a half-life of 1.01 yr. What mass (inmg) of a 2.00-mg sample will remain…

A: Given, half life of  ²¹²₈₃Bi ,  t1/2 = 1.01 yr = 365 x 24 x 1.01 h = 8847.6 h            initial…

Q: 1a) How long will it take for 30 g of 222Rn to decay to 7.5 g? 1b) How many grams of 1°N will be…

A:

Q: Ten grams of the plutonium isotope 239Pu were released in a nuclear accident. How long will it take…

A: Step : 1               How long will it take for the 10 grams to decay to 1 gram?

Q: Radium-226 is radioactive and has a half life of 1600. years. How long would it take a sample to…

A: The emission of energy in the form of the ionizing radiation is called radio decay.This radiation…

Q: 1.What is the half-life of 99Tc if a 500.0 g sample decays to 62.5 g in 639,000 years 2)How much of…

A: Given,Mass 500 g,Therefore, the first half-life is 250.0g.Second half-life is 125.0g.Third half-life…

Q: How long does it take for 105 mg of tritium H to decay to 35.0 mg? The half-life of tritium is 12.3…

A: All radioactive decays are first order reaction.

Q: 214Bi is a radioactive isotope of the element bismuth with a half-life of 19.7 minutes. What…

A: Welcome to bartleby !  Introduction :  We have to calculate percentage of bismuth lost . Given :…

Q: A sample of Tl-201 has an initial decay rate of 5.88 × 10^4/s. How long will it take for the decay…

A: First, the rate constant value is determined by using the given half life period.

Q: Iodine-131 undergoes beta emission with a decay constant of 0.0864 1/days. If you start with 35.0 mg…

A:

Q: Radium 223 decays with a 1/2 life of 11.4 days. How one will it take for 0.240 mol sample of radium…

A:

Q: b. The half-life of W-161 is 400 ms (milliseconds). Calculate the amount of time required for 100 g…

A: Half life of W, t1/2 = 400 ms t1/2=400×10-3 s Initial mass of W-161, Ao = 100 g Final mass of W-161,…

Q: 137 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

Q: The common isotope of uranium, 238 U, has a half-life of 4.47 x 109 years, decaying to 234 Th by…

A: All radioactive decay processes follow first order reactions. Calculating rate constant for first…

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 Q value for the alpha decay of Tl203 is calculated to be 0.91 MeV from the masses of the initial…

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Q: Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.20…

A:

Q: How much time in hours would it take for a 1.330 g sample of 233Pa to decay to a mass of 0.8628 g if…

A: Given, Half life = 5.1473 x 106 s Initial Mass of sample = 1.330 g  Time = ?

Q: A radioactive isotope has a half life of 60.2 minutes.How long will it take for radiation from a 325…

A: The radioactive decay of an isotope follows a first-order reaction, The integrated rate law for a…

Q: 3.) The Radioactive nuclide co has a half-Life of 8.5 hours, 55 27 what mass of Co Temains from a.…

A: Mass of sample remains after 18 hours is       0.0045 g.

Q: Given that the ratio of C/1C 13.6 counts per minute per gram living matter remains constant, if a…

A: This problem is based on radioactivity. Since all the radioactive reactions generally follows first…

Q: What is the half-live of a radioactive isotope if it takes 6.2 days for a 72g sample to decay to…

A: Given, 72 g to decay to 18 g. t = 6.2 days To calculate the half-life.

Q: (A). Sodium-24 has a decay constant of 4.63 x 10-2 h-1. What is its half life? (B) The half life of…

A: Given that,decay constant = λ  = 4.63x10-2 hr-1   t1/2 = ln 2λ where t1/2 is the half life t1/2 = ln…

Q: Iodine-131 is an important radioisotope of iodine that has a radioactive decay half-life and is…

A: Radioactive decay follows first order rate law, we can mathematically expressed it as At = Ao…

Q: What is the half life of a radioactive sample, if3/4of its nuclei decay in 2 years?

A: The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass = 1The…

Q: What is the half‑life of an isotope that decays to 3.125%3.125% of its original activity in 41.8 h?

A: All radioactive decay follows first order kinetics. The half-life t1/2 of the radioactive decay is…

Q: The decay constant or the beta decay of ^99 43TC was found to be equal to 1.0x10-13/s. What is the…

A:

Q: A patient is given 0.050 mg of Tc-99. How long until the isotope decays to 6.3 x 103 mg? (Half life…

A: Given  Mass of Tc-99  [ A0 ] = 0.050 mg  Remaining Tc -99 [ At ] = 6.3 × 10-3 mg  Half life ( t1/2 )…

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.