A certain radioactive isotope has a half-life of 55 days. About how long would you have to wait before 1/10001/1000 of an initial sample of this isotope remained? 20 days 40 days 50 days 100 days 1000 days

Q: You have 400 g of a radioactive sample with a half-life of 20 years. How much is left after 50…

A: Given data:  Initial amount of radioactive sample (N0) = 400 g Half life (t1/2)= 20 years Total time…

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…

Q: 1. The decay of radioactive substance is given by 7 N = Noe (1), where N is the number of atoms…

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Q: If a sample of radioactive isotopes takes 60 minutes to decay from 200 grams to 50 grams, what is…

A: Initial value of radioactive isotopes = 200 gram.It reduces to amount 50 gram.Time taken to decay =…

Q: A certain radioisotope has a half-life of 7.84 days. What percentage of an initial sample of this…

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Q: The corresponding graph shows a group of points (a, b, c, d), which represent the number of original…

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Q: A sample of radioactive material contains 1000 atoms. A half-life of this material is 2 days. How…

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Q: What fraction of a radioactive sample is left after exactly 6 half lives? Give your answer to 3…

A: Number of half life (n) = 6

Q: A radioactive sample is observed for 160 days. After 160 days the amount of the sample is found to…

A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…

Q: You have 12 kg of a radioactive substance. Ten years later, you find that you only have 3 kg left.…

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Q: The radioactive isotope 209 Po has a half-life of 103 years. How long would it take 84 for only 4.00…

A: Given: The half-life time is 103 years. The remaining sample is 4 g. The total amount of the sample…

Q: A radioactive material has a half life of 4.6 minutes.  After 8.1 minutes, which percentage of the…

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Q: One half-life of an isotope is 22 years. How many years would it take to have only 25% of the…

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Q: A radioactive sample is observed for 5 days. After 5 days the amount of the sample is found to be…

A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…

Q: Use the following half-life graph to answer the question: What is the mass of the radioactive…

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Q: A certain radioactive isotope has leaked into a small stream. Three hundred days after the​ leak,…

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Q: Q4. A. Use the graph as shown below. Determine the half-life of Plutonium-239. Undecayed particles…

A: Given  At , t = 0  Amount of Plutonium-239  &  Carbon -14 are      100℅  .  (A) from given graph…

Q: Use the equation for radioactive decay and solve for an algebraic expression for the time, “t” in…

A: Heavier nucleus are unstable. This is because there is increase in number of protons. This increase…

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: Use the following table of atomic masses to determine the energy released in the alpha decay of 243,…

A: Result             5.43 MeV Solution

Q: Radon-220 has a half-life of 55.6 seconds. What are the odds that any particular Radon-220 atom will…

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Q: A 10 g sample of a radioactive element took 12 days to reduce into 1 g. Calculate the half-life and…

A: Some configurations of protons and neutrons inside a nucleus are unstable. When an atomic nucleus is…

Q: A 5 g sample of a radioactive element takes 102 days to reduce into 3 g. Calculate the half-life and…

A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…

Q: Consider a small pot with a copper base. The base has a thickness of 2.0 mm and a diameter of 15 cm.…

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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…

A: Radioactive decay takes place when an atomic nucleus becomes unstable. The rate of decay is known as…

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…

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.