If the age of Earth is 4.6 billion years, what should be the ratio of 206P6/238U in a uranium-bearing rock as old as the Earth?
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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: 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: Suppose we have a sample containing 1.91 mCl of radioactive 131 (t,2 - 8.04 d). (a) How many decays…
A: Solution: Given that half-life of the sample, t1/2 = 8.04 days = 694656 s. Time for decay, t = 5week…
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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…
A: Half life of C-14 T1/2= yearsinitial activity of sample A0= BqActivity of sample At = Bq
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: At present, concentration of 92235U in naturally occurring uranium deposits is approximately 0.7…
A: Concentration after 1.7 billion year is = 0.13%
Q: Suppose there is a mineral body which contained some amount of 238U, which has a half-life of…
A: half life of U-238 = 4.51×109 years After some time, U-238 atoms Lead atoms = 0.64
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- Xe-124 an isotope of xenon has the highest half-life of 1.8 × 1022 yrs. Estimate the time it would take for a sample of Xe-124 to reach 10% of its current level.The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 1.0*10^ 3Bq. The activity in a similar-sized sample of fresh wood is measured to be 6.9*10^3 Bq. Calculate the age of the artifact. Round your answer to 2 significant digits.Radium-226, the first radioactive isotope used for its radioactive properties, has a half life of 23.0 centuries. How long does it take in centuries for this isotope to degrade by 30.6%? (the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 120. and -123 and 123. and 12.3)
- A radioactive isotope has a half-life of 4 days. How much of the isotope is left in a 20-mg sample after 4days (Equation and answer only.. .2 decimal places )The half-life of 23U is 4.5 x 10° yr. A sample of rock of mass 1.6 g produces 29 dis/s. Assuming all the radioactivity is due to 23®U, find the percent by mass of 23*U in the rock.A 25g piece of charcoal is discovered in a prehistoric cave. Carbon 14 of the sample shows a radioactive activity of 250 disintegrations / minute. If we estimate that originally the decay was 376 decays / minute, for how long is the tree from which the carbon sample was taken dead? The half-life of carbon-14 is 5730 years.
- The amount of carbon-14 found in a fossil of a tree is around 0.05% when compared to fresh wood of the same kind. Estimate the age of the fossil.Mantles for gas lanterns contain thorium because it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100 % 232^Th, with half life of 1.405*10^10y. If an average lateen mantle contains 350mg of thorium what is its activity (in Bq)Note in Table that the half-lives of two abundant isotopes of tellurium are more than 1021 years. (a) What is the decay rate per unit mass of 128Te, which decays by emitting two β-, in units of s-1 . kg-1? (b) How much mass of a natural sample of tellurium would it take to measure a decay rate of 10 β-/s for 128Te?
- Please answer the question with steps… Thank youAlIMS 2016 36. Initial number of nuclei of a radioactive substance is 5 x1016 and half life is 10 yrs. Find number of nuclei decayed in 5 yrs. (1) 2 x 1016 (2) 1.5 x 1016 (3)3.5 x 1016 (4) 2.5 x 1016 27Iodine-131 is used in the form of sodium iodide to trwat cancer of the thyroid. The isotope has a half life of 8.04 days. If you begin with 25.0-mg of radioactive 131I, what mass remains after 32.2 days?