In a lab a radioactive sample is studied for 5 days. It was observed that the radioactive nuclides in the sample re 0.25% of its initial value after 5 days. With this data calculate the half-life of the given sample
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Q: The half-life of a particular element is 330 days. What is its decay constant?
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Q: Radioactive 214^83 Bi has a half-life of 19.9 min if the activity of the radionuclide 1.2 hours…
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Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 60.2 h?
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Q: The nuclide 10,4 Be undergoes spontaneous radioactive decay to 10,5 B with emission of a beta…
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Q: A radioactive sample studied in a lab is found to have a half-life of 48 hours. If the initial…
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Q: After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an…
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Q: Tritium has a half-life (half-life) of 12.33 years. In a sample of tritium, what percentage of 3H…
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Q: A nuclide whose "generic" symbol is 6430X would have protons and neutrons.
A: The generic symbol of a nuclide is given as X3064.
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Q: Problem 8: In a living organism, a fixed fraction 1.30 × 10-12 of 12C is the radioactive isotope…
A: Given data: fixed fraction =1.30 × 10-12 of 12C Need to determine the numeric value is expected.
Q: A radioactive sample studied in a lab is found to have a half-life of 25 hours. If the initial…
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Q: A 10 g sample of a radioactive element takes 16.21 mins to reduce into 6 g. Calculate the half-life…
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Q: After 1.86 days, the activity of a sample of an unknown type of radioactive material has decreased…
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Q: The half-life of a radioactive isotope is 140 d. How many days would it take for the decay rate of a…
A: Given that, Half life of the isotope, T = 140 days We know that, The half life is the time in…
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Q: As a staff scientist at a nuclear power plant, it is your job to understand radioactive substances…
A: Here we use law of radioactive decay to find the answer
Q: If it is known that 87% of an initial radioactive sample remains after 3 days, what is the decay…
A: Given: The amount of radioactive decay is 87% of the initial amount. The time is 3 days.
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
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- A building has become accidentally contaminated with radioactivity. The longest-lived material in the building is strontium-90. (The atomic mass of 90/38 Sr is 89.9077 u.) If the building initially contained 8.6 kg of this substance and the safe level is less than 10.4 counts/min, how long will the building be unsafe? Provide answer in number of years.A certain isotope has a half-life of 5.9 h and an atomic mass of 95.98 u. What will the activity in Bq of a 1.36-g sample be after 19.8 h?After 2.14 days, the activity of a sample of an unknown type radioactive material has decreased to 82.2% of the initial activity. What is the half-life of this material? days Need Help? Read It
- The half-life of beryllium-7 is about 53.3 days. (a) Determine the decay constant for beryllium-7. (b) What percentage of a sample remains undecayed after two weeks (1.21 ✕ 106 s)?What fraction f1 of a radioactive sample will be left after 3 half‑lives? f1 = ? What fraction f2 of a radioactive sample will be left after 8.5 half‑lives? f2 = ?It is known that the initial number of atoms in a radioactive sample is No = 4.0 x 108 atoms. If the the half life of the sample is measured to be 6 days, what is the initial activity R0 of the sample? units in Bq
- After 1.80 days, the activity of a sample of an unknown type radioactive material has decreased to 80.4% of the initial activity. What is the half-life of this material?A radioactive sample is studied for 100 days. It was found that after the given period the radioactive sample reduced to 83 % of the initial amount. From the given data estimate the half-life of the sample.A sample of radioactive material has a half-life of 12 hours. If the initial sample contained 6.2x10¹3 radioactive nuclides estimate the number of radioactive nuclides present in the sample after 5 hours.
- Thorium 22890Th produces a daughter nucleus that is radioactive. The daughter, in turn, produces its own radioactive daughter, and so on. This process continues until bismuth 21883Bi is reached. What are (a) the total number Nα of α particles and (b) the total number Nβ of β- particles that are generated in this series of radioactive decays?Does the number of radioactive nuclei in a sample decrease to exactly half its original value in one half-life? Explain in terms of the statistical nature of radioactive decay.