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.
Q: A radioactive sample has a decay constant of 55.0 x 10-¹2 s¹. Estimate its half-life.
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Q: Choose the BEST answer to the following. A radioactive sample has a half-life of 1 hour. Starting…
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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: (c) What is the work done on the particle between the starting point and the point of furthest…
A: Mass of the particle (M) = 100 g = 0.1 kgAcceleration of the…
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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: In a lab a radioactive sample is studied for 5 days. It was observed that the radioactive nuclides…
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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…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The half-life for a…
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Q: Determine the half-life (in s) of a radioactive sample that has a decay rate of 3.30 ✕ 1011 Bq when…
A: Given. N = 1.7*10¹⁵ dN/dt = 3.3*10¹¹ Formula used N(t) = N⁰*0.5t/T Where T is half life
Q: A Geiger counter reading of a radioactive sample is initially 7020 counts per minute. The same…
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Q: A radioactive sample is prepared; 10.78 hours later, only 1/16th of the original sample remains.…
A: Activity N=N0e-λt 10.78 hours later, only 1/16th of the original sample remains N016=N0e-λ10.78…
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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 radioactive sample studied in a lab is found to have a half-life of 25 hours. If the initial…
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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: A radioactive sample has a half-life of 28 mins. If the initial amount of sample was 2 g, estimate…
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Q: Strontium-90 is a radioactive material that decays according to the function A(t) = An e -0.0244t…
A: Given that---- initial amount of material A0 = 500 g. Radioactive material decay function-----…
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A: Given that, Half life of the isotope, T = 140 days We know that, The half life is the time in…
Q: A building has become accidentally contaminated with radioactivity. The longest-lived material in…
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Q: A Geiger counter reading of a radioactive sample is initially 6520 counts per minute. The same…
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- Question 1. Tritium has a half - life of 12.33 years. What fraction of the nuclei in a tritium sample will remain (a) after 5.00 yr? (b) after 10.0 yr? (с) after 123.3 yг?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 Itthe decay of a radioactive material has a count rate is 2000 decays/min. 4 hours later, the decay rate is 500 counts/min. what is the half-life?Barium-133 is a radioactive element used in certain medical procedures. A sample of pure Barium133 has a mass of 18.000 grams. Determine the activity of the sample 47 years after it was created, in units of Curies.
- 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)?A sample of radioactive isotope is found to have an activity of 110 Bq imediately after it is pulled from the reactor that formed the isotope. Its activity 1 h, 20 min later is measured to be 89 Bq. Find the decay constant of the sample. Answer in units of h-. Find the half-life of the sample. Answer in units of h. How many radioactive nuclei were there in the sample initially?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 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.The half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222. 2.1x10-65-¹ ✓ (b) What percentage of a sample remains undecayed after two weeks (1.21 x 106 s)? %