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.
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A: Given: The half life time of thorium is t1/2=1.405×1010 y. The mass of thorium in lantern is m=300…
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Q: A certain radioactive nuclide decays with a disintegration constant of 0.0256 h1 (a) Calculate the…
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A: Half-life of radioactive element: = 5.73 x 103 y Activity of radio active element: A(t) = 0.259 Bq…
Q: B. Carbon-14 is a radioactive isotope of carbon that has a half-life of 5600 years. It is used…
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Q: The decay behavior of a radioactive substance obeys first order kinetics: ln(N/No) = –kt, where N is…
A: first order kinetics,lnNN0=-ktwhere N is amount of radioactive nucle at timehalf life=20 min=1200…
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Q: After how many half-lives will (a) 10.0%, (b) 5.00%, and (c) 1.00% of a radioactive sample remain?
A: Formula to calculate the number of half-lives is,
Q: Why is carbon dating ineffective in finding the ages of dinosaur bones?
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Q: A radioactive sample has an initial activity of 6.55 x 10°Bq (1Bq is one disintegration per second).…
A: Given, initial activity N0 = 6.55 x 109 Bq After t=4 hours, activity N = 1.02 x 108 Bq Half life…
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Q: When any radioactive dating method is used, experimental error in the measurement of the sample's…
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Q: Choose the BEST answer to the following. A radioactive sample has a half-life of 1 hour. Starting…
A: The number of half -life passed in a time is,
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Q: A sample from human remains found near Stonehenge in England shows that 71.2% of the carbon-14 still…
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Q: Assume that the decay rate for Carbon 14 is k=0.00012. If charcoal found in an ancient fire pit…
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Q: 4. a) A fossilised tree was tested and contains 10 grams of Carbon-14. Given that there was 12 grams…
A: According to the exponential law of radiation, we have N=Noe-λt where λ is the decay constant and No…
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: (b) The results of activity measurements on a radioactive sample are given in the Table. i) Find the…
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Q: Sihle, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…
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Q: Carbon is one of the fundamental elements in everything that's alive on Earth. The three naturally…
A: Carbon has generally three isotopes found in nature. Isotopes are those which have the same proton…
Q: Tritium, or hydrogen-3, is formed in the upper atmosphere by cosmic rays, similar to the formation…
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Q: A radioactive substance decays from 60mg to 12.6mg in 20 years according to the exponential decay…
A: Given value--- decays from 60mg to 12.6mg in 20 years . We have to find--- a) find the b -value…
Q: The half-life of a radioactive isotope is known to be exactly 1 h. a) What fraction of a sample…
A: Given in question - Half-life (T) = 1 hour Solution: Step1 - Here we will understand the concept…
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: radioactive substance has a half life of 2120 years. A) Determine the rate constant for the decay…
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Q: How many half-lives must elapse until (a) 77% and (b) 99 % of a radioactive sample of atoms has…
A: Solution in answer, feel free to ask for clarifications if needed.
Q: A wooden object found in an indian burial groud and subjected to radiocarbon dating. The decay rate…
A: Given: The final disintegrations N = 10 disintegrations per minute per gram carbon.
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Q: Xe-124 an isotope of xenon has the highest half-life of 1.8 × 1022 yrs. Estimate the time it would…
A: When a nucleus becomes unstable it will undergo radioactive decay to attain a stable configuration.…
Q: A sample of carbon-14 initially consists of 5 × 10 24 particles. Carbon-14 has a half- life of 5730…
A: Solution: a. Calculate the decay constant for carbon-14 using the following relation. k=0.693t12…
Q: Determine the age of a certain rock sample: carbon -14 half life = 5730 years. An archeology dig…
A: Given that: t0.5=5730 yrs.A=1 CpmA0=16 Cpmλ=?t=?
Q: A mummy is discovered in a re- cently unearthed tomb. Based on the other artifacts in the tomb, it…
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Q: The amount of radioactive material present at time t is given by A =?0? ?? where ?0 is the initial…
A: Amount of radioactive substance at time t is, A=Aoekt.............1 where Ao is the initial amount,…
Q: Question 1. Tritium has a a tritium sample will remain (a) after 5.00 yr?
A: GivenHalf Life for Tritium, t1/2=12.33 years
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 T1/2= yearsInitial activity of the sample A0=6.9 BqActivity of sample At= 1.0 Bq
Q: 20.0 hours after being ingested 74.5 % of the original radioactive atoms have decayed or been…
A: Given,The amount of particles initially = N0The particles present after 20 hours, Nt = 0.255 ×N0…
Q: A radioactive isotope has a half-life of 4 days. How much of the isotope is left in a 20-mg sample…
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Q: You find a 37.2 g fossilized bone that has an activity of 0.024 counts per second. How old is the…
A: A living matter has 1.3×10-10 % of C-14, and the half-life of C-14 is 5730 years. Thus, determine…
Q: Radioactive potassium-40 has a half-life of 4.2 x 1016 s. a) Calculate the decay constant of…
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