Uranium-238 forms thorium-234 after radioactive decay and has a half-life of 4.5 x 10^9 years. How many years will it take to decay 75% of the initial amount?

Q: The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The…

A: Answer : Since radioactivity follows first order kinetics . Given : Half life = 14.3 days . Initial…

Q: The half-life of the radioactive isotope astatine-218 is 2.00 seconds. How long will it take for the…

A: all radioactive reactions are first order.  Here first calculate the rate constant with the help of…

Q: The radioactive isotope of lead , Pb-209, decays at a rate proportional to the amount present at…

A: Given information: Half-life = 3.3 hours Amount decayed = 90%

Q: Tritium (3H) is used in glowing "EXIT" signs located where there is no electricity for lightbulbs.…

A: Provided half life of 3H =12.26 year Provided time(t)=65.2 years The rate constant when  half life…

Q: The half-life of a radioactive element in the first order reaction is 45 minutes .How long will it…

A:

Q: Iodine-123, which is used for diagnostic imaging in the thyroid, has a half-life of 13 hours. If…

A: Given 50mg of Iodine-123 was prepared at 8AM Monday, the remaining grams present at 10AM of next day…

Q: The half life for the radioactive decay of potassium-40 to argon-40 is 1.26 × 10⁹ years. 9 Suppose…

A: we need to calculate the age of the rock

Q: 5. Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are…

A: Answer: Relation between quantity of radioactive substance and n number of half lives is shown…

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

A:

Q: The half-life for gallium-67, a radioisotope, is 78.25 hours. How much of a 56.7 sample of…

A: Given datas ;  t1/2 = 78.25 hrs. [A]0 = 56.7 mg  [A]t = ?  t = 359 hrs.  t/t1/2   = 359 hrs / 78.25…

Q: The half-life of the radioactive isotope phosphorus-32 is 14.3 days. How many days does it take for…

A: The equation for 1st order decay is:

Q: (d) How long does it take for 90% of a given quantity of the radioactive element cobalt-60 to decay,…

A:

Q: The half-life for the first order radioactive decay of lodine - 131 is 8.0 days. After 3 half lives,…

A: Given, Half life for the first order radioactive decay of iodine-131 = 8.0 days After 3 half lives…

Q: Analysis of argon-40 in a rock sample using a mass spectrometer was performed. It was found out that…

A: The nuclear reaction for the decay of K-40 to Ar-40 is: K1940 → A1840r + β+10 Given the half-life of…

Q: Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are formed,…

A:

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

A:

Q: 8) The half-life for the (first order) radioactive decay of "C is 5730 years. An archaeological…

A: Answer: Data given- half-life for radioactive decay  of 14C is 5730 yrs. 70% of the 14C found in…

Q: The first-order decay of thallium-201 is used to image heart muscle in patients with suspected heart…

A: The half-life of the thallium-201 is = 73 h The percent reactivity of the thallium-201 after 48 h is…

Q: Iron-59 is a radioisotope used to study iron metabolism in the spleen. It has a half-life of 44.5…

A:

Q: (5) Radioactive decay is measured in terms of "half-life", which is the number of years required for…

A:

Q: The isotope strontium-90 is produced during testing of nuclear weapons.  If 100.0 mg of strontium-90…

A: Given  Initial Amount of Sr - 90  (A)o = 100 mg  Half life time ( t1/2 )  =  29 years  Time ( t ) =…

Q: Cobalt – 60 used in cancer therapy, decays by beta and gamma emission. The decay constant is…

A: Consider the given information is as follows; Decay constant λ = 4.18×10-9/s Half-life t12 = ?

Q: The half-life of plutonium-239 is 24,110 years. If an original sample is 100. grams, how much…

A:

Q: Heeded for this question. The half-life of the radioactive isotope thallium-210 is 1.30 minutes. How…

A: half-life = t1/2  = 1.30 min initial concentration = ao = 51.3 microgram final concentration = a =…

Q: The half life for the radioactive decay of potassium-40 to argon-40 is 1.26 x 10 years. Suppose…

A: Given-> Half life = 1.26 × 109 year Initial amount of potassium = 1.00 mmole Final amount of Ar =…

Q: An isotope of thorium, 227Th, has a half-life of 18.4 days. How long will it take for 83% of the…

A: The correct answer of the question is given below

Q: The half-life of plutonium-239 is 24,100 years. How long will it take for a 100 g sample of…

A: Given,  Half life, t1/2 = 24100 years Initial amount = 100 g Reduced amount = 25 g Formula Used…

Q: The half life for the radioactive decay of carbon-14 to nitrogen-14 is 5.73 x 10 years. Suppose…

A: Radioactive decays are first order reactions. Here, beta decay occurs to convert carbon-14 to…

Q: The radioactive isotope 64Cu is used in the form of copper(II) acetate to study Wilson's disease.…

A:

Q: For the radioactive isotope, phosphorus-32, how much would be used if there is only 3.50 mg left in…

A:

Q: Strontium-90 is one of the radioisotopes released in the Chernobyl nuclear plant accident. The…

A:

Q: Strontium-90 is one of the radioisotopes released in the Chernobyl nuclear plant accident. The…

A:

Q: The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The…

A:

Q: The half life for the radioactive decay of carbon- 14  to nitrogen- 14  is  ×5.73103  years.…

A: Half life of radioactive element-is the time needed for given number of its nuclei to decay exactly…

Q: A nuclear power plant emits into the atmosphere a very small amount of krypton-85, a radioactive…

A: Given: Half life (t1/2) = 10.76 years  Total time (T) = 25 years

Q: The half life for the radioactive decay of carbon-14 to nitrogen-14 is 5.73 x 10° years. Suppose…

A:

Q: The rate constant for the decay of a radioactive element is 5.96 × 103 day1. What is the half-life…

A:

Q: The isotope 226Ra has a half-life for radioactive decay of 1600 y. How long will it take the amount…

A: Half -life for radio active decay:

Q: The half life for the radioactive decay of rubidium-87 to strontium-87 is 4.88 x 10" years. Suppose…

A:

Q: The half life for the radioactive decay of carbon-14 to nitrogen-14 is 5.73 x 10° years. Suppose…

A: Given: 1.  The half-life of radioactive decay of carbon-14 to nitrogen-14 2. C-14 forms N-14…

Q: 2) Cobalt-60 is used in radiation theraphy. It has a half-life of 5.26 years. a. Calculate the rate…

A: Half life of Co-60 (t1/2) = 5.26 years The rate constant of the decay is given by:…

Q: The half-life of radioactive cobalt is 5.27 years. Suppose that a nuclear accident has left the…

A: Given the half-life of cobalt=5.27 years.

Q: If the first-order half-life of tritium (°H) is 12.26 years, what amount of time is necessary for it…

A: The half-life is the time taken for the reaction to complete half of its original concentration

Q: The half-life of the radioactive isotope 137Cs is 30.17 years. How long does one have to wait until…

A:

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

A:

Q: 47.  Recently, the skeleton of King Richard III was found under a parking lot in England. If tissue…

A: Radioactive decay follows the first order kinetics. The rate equation for the first order reaction…

Q: Strontium−90 is one of the products of the fission of uranium−235. This strontium isotope is…

A:

Q: What is the half-life

A: Half life of a reaction is the time taken to reduce half the initial concentration of the…

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.