The graph below shows how the radioactivity of a particular isotope varies with time. What is the half-life of this isotope? 10 15 20 Time (days) Activity (counts/minute) 22332222 O 12.5 days 5 days 10 days O 2.5 days

Q: 8. Iodine 131 I is used in diagnostic and therapeutic techniques in the treatment of thyroid…

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Q: Choose the BEST answer to the following. The equation that most underlies energy release in nuclear…

A: The equation in option (a) gives the energy of a photon.

Q: The activity of a radioactive isotope is 16000 disintegrations/sec. The activity drops to…

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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 1.13-cm panel of a certain material can absorb 86.5% of incoming rays from a radioactive source.…

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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: The isotopes of U8 and U5 occur in nature in the ratio 140 : 1. Assuming that at the time of earth's…

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Q: Radiation therapy uses high-energy radiation to damage the DNA of cancer cells, which kills them or…

A: As already stated in the question, Radiation therapy uses high-energy radiation to damage the…

Q: 15 Isotope of oxygen, g0, is susceptible to beta-decay. Which particles/radiation are released in…

A: We need to find the beta decay products for 15 8 O.

Q: a) Define the activity of a radioactive source b) The activity of a radioactive source is…

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Q: Q2:-Two samples of the same radioactive nuclide are prepared, each having the same size. Sample A…

A: SOlution: Given that the raltion between half lide and sample decay is T1/2 = ln2/λ the relation…

Q: The photoelectric work function of potassium is 2 eV. What potential difference would be applied…

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Q: Cs-137 has a half-life of 30 years. Approximately how much time is required for the radiation of…

A: Given Data : The half-life of Cs-137 is given as t12=30 years

Q: 1. A radioactive substance has a half-life period of 60 days What is the disintegration constant?…

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Q: raph the “Number of Nuclei in the Sample” versus the “Half-life Number.” If the sample has 1/8 of…

A: The final concentration of radioactive nuclei is We know that;Here, n is the number of half-lives,…

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

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Q: Which nuclide(s) would you predict to be stable? Why?(a) ²⁰₈O(b) ⁵⁹₂₇Co(c) ⁹₃Li

A: To determine in which the nuclide would you predict to be stable (a) ²⁰₈O (b) ⁵⁹₂₇Co (c) ⁹₃Li

Q: You have 16 kg of a radioactive sample with a certain half-life of 30 years. How much is left after…

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Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…

A: a) Calculate the decay constant. N(t)=Noe-λt λ=1tlnNoN Substitute the values. λ=1365 daysln200 g7.1…

Q: A certain radioactive element has a half life of 3 hours.  How many hours would pass during 4…

A: Half life for a radioactive material is the time taken by the material to radiate to it's half…

Q: 131 8. Iodine I is used in diagnostic and therapeutic techniques in the treatment of thyroid…

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Q: A sample initially consists of No radioactive atoms of a single isotope. After a time, t, the number…

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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: The iodine isotope ¹331 is used in hospitals for diagnosis of thyroid function. If 570 µg are…

A: Since you posted a question of multiple subparts type questions, we will solve only the first three…

Q: an archaeological dig uncoveres an ancient spear whose wooden handle contains 1/8 the radioactive…

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Q: A sample of radioisotope has a decay constant of 9.976x10s1 and prepared with an initial activity of…

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Q: Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.…

A: Radioactive decay is the process by which unstable nuclei spontaneously lose energy to become…

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: Q1) As of early 1981, approximately 1500 000 litres (1500 m³) of radioactive water were located in…

A: We are given the activity of the sample in water which was Cesium. We are also given half life of…

Q: The age of a piece of wood from an archeological site is to be determined using the Carbon-14…

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Q: What fraction of radioactive nucleus sample survive after two half-lives?

A: Half-life is the time taken by the radioactive element to become the half of the original amount as…

Q: he isotope C has a half-life of 20.4 min. Determine the time interval (in min) required for the…

A: Given that                 The half life (t1/2) = 20.4min                 Activity of a sample of…

Q: Use Table to list some radioactive nuclides that may be useful for dating the age of Earth

A: For the dating of the age of earth, the element must have age near about Earth's age. And the age of…

Q: 212, 86 Rn is an odorless gas which decays via alpha decay with a half-life of 24 minutes. a) What's…

A: Decay constant, λ =0.693half life time=0.693t1/2