Estimate the decay constant of a radioactive sample that has a half-life of 50 years.
Q: A radioactive sample has a decay constant of 55.0 x 10-¹2 s¹. Estimate its half-life.
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Q: radioactive sample initially undergoes 12.0×10^4 decays/s. Twenty-four hours later, its activity is…
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Q: A radioactive sample has an activity of 250 Bq and contains 6.52×10¹³ radioactive nuclides. Estimate…
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Q: A radioactive sample has a decay constant of 2.97 x 10 s¹¹. Estimate the half-life.
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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: 3. A sample of a radioactive isotope is found to have an activity of 115.0 Bq immediately after it…
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Q: a) The half-life of iodine-125 is 59.4 days. If the initial mass of iodine-125 is 128 µg, what mass…
A: a) Given, the half-life of iodine-125 is T12=59.4days the initial mass of iodine is…
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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 sample of radioactive material is studied in a lab and is found to have a decay constant of 100 ×…
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A: Given, The half-life of radioactive elements is 25.4 days The initial activity, R=4.50×108 Bq
Q: Marie and Pierre Curie managed to extract 1 mg of radium from ten tonnes of uranium ore in 1898. The…
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Q: The number of radioactive nuclei present at the start of an experiment is 5.38 x 1015. The number…
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Q: Half life of a radioactive isotope is 4x108 years. If there are 10³ radioactive nudei in a sample…
A: Given : Half life of the radioactive isotope, t1/2 = 4×108 years Current number of radioactive…
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: Two radioactive isotopes, X and Y, both decay to stable products. The half-life of X is about a day,…
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Q: Americium-243 has a decay constant of 9.39* 10-5 years-1. How long will it take for a sample of…
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Q: The half-life of beryllium-7 is about 53.3 days. (a) Determine the decay constant for beryllium-7.…
A: Given value--- Half life time = 53.3 days. We have to find--- (a) Determine the decay constant…
Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 24.2 h?…
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- A radioactive sample has a decay constant of 49.15x10-12 s¹. Estimate the half-life.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?The half-life of a radioactive material is 1.0 year. There are No such nuclei at time t = 0. (a) What is the probability per unit time for a nucleus to decay? (b) How many parent nuclei are left (haven't yet decayed) at t = 1.5 years? (c) How many parent nuclei are left (haven't yet decayed) at t = 2.0 years?
- A freshly prepared sample of a certain radioactive isotope has an activity of 10.0 mCi. After 4.00 h, its activity is 8.00 mCi. Find (a) the decay constant and (b) the half-life.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.What is the half -life of potassium-40 if 1.70×10^19 nuclei have an activity of 300 Bq