A radioactive element X has a half-life of 30 hours. It decays via alpha, beta and gamma emissions with the branching ratio for beta decay being 0.75. The partial half-life for beta decay in unit of hours is

Q: The half-life of a particular element is 330 days. What is its decay constant?

A: The relationship between Half life t1/2 and decay constant λ is  t1/2=ln2λ=0.693λ where ln2 is…

Q: A sample containing I-131 has an activity of 6.40 × 108 Bq. How many days later will the sample have…

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Q: In 1991, German tourists discovered the well-preserved remains of a man, now called “Ötzi the…

A: When scientists date a sample it is essential that the isotope which is used to date the sample…

Q: The disintegration rate of certain radioactive substance at any instant is 4750 disintegrations per…

A: To find- Half life (T)=?Given-N0=4750N1=2700t=5 min

Q: A Geiger- Mueller counter registers an initial reading of 3200 counts while measuring a radioactive…

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Q: One of the radioactive isotopes used in medical treatment or analysis is palladium-103. The…

A: Solution Given, half life of palladium(t1/2) = 17 days A0 = initial activity  At = activity at time…

Q: A radioactive sample has an initial activity of 6.55 x 10°Bq (1Bq is one disintegration per second).…

A: Given, initial activity N0 = 6.55 x 109 Bq After t=4 hours, activity N = 1.02 x 108 Bq Half life…

Q: If a radioactive substance has an initial activity of 0.67 Ci and a half-life of 3.0 days, what is…

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Q: Fluorine-18 (F-18) is a commonly used radionuclide for PET scans. The half-life of F-18 is 110 min.…

A: Part (a): Let A0 denote the initial activity of the FDG solution. The volume of the FDG solution is…

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: A thyroid cancer patient is given a dosage of 131I (half-life = 8.1 d). What fraction of the dosage…

A: The objective of the question is to find out the fraction of the dosage of Iodine-131 that will…

Q: radiation lab orders 64 Ci of P-32. After 42.9 days the activity of the sample is 8.0 Ci. What is…

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Q: unknown radioactive element decays into non-radioactive substances. In 480 days the radioactivity of…

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Q: 14. Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gram sample of initially pure…

A: Note: Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: A 60-kg person accidentally ingests a small source of alpha particles (RBE=15). The activity of the…

A: Given that,Mass of person (m) = 60 (kg)a: Here we need to find the number of alpha particles that…

Q: A sample of radioisotope has a decay constant of 9.978x107 s1 and prepared with an initial activity…

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Q: Calculate the radioactivity of 0.5mg of cobalt 56 in units of curie? Its radioactivity is 50 days,…

A: Given data: The sample amount of cobalt is  m=0.5 mg=0.5×10-3 g The atomic mass of cobalt is A= 56 g…

Q: Samarium-153, a radioactive isotope with a half-life of approximately 48 hours, is used to treat…

A: Given, Half life, T1/2=48hours=2 days

Q: Question 10 of 22 Radium (A = 226, Z=88) decays to Radon (A = 222, Z=86) with a half-life of 1600…

A: in this  question  we discuss  about decay of radioactive substances.

Q: The half-life of a particular element is 330 days. What is its decay constant?

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Q: The binding energy of a nucleus is 369.4 MeV. What is the mass defect of the nucleus in atomic mass…

A: Binding energy of a nucleus is B.E.=369.4 MeV Note: 1 J=6.2×1012 MeV 1 J=1 Nm 1 N=1 kg·m/s2 1…

Q: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5 730 yr)…

A: Determine the number of carbon molecules per mole. Determine the initial number of atoms of C-14.

Q: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half- life = 5 730…

A: In this question we have to find out the age of the samole in the nearest year with the help of the…

Q: A sample of radioisotope has a decay constant of 9.978×107 s1 and prepared with an initial activity…

A: Given: The decay constant of the radioactive sample is 9.978x10-7 s-1. The initial activity of the…

Q: 75% of a quantity of U-232 remains after 30 years. What is the half-life?

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Q: A 60-kg person accidentally ingests a small source of alpha particles (RBE=15). The activity of the…

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Q: A 70-kg worker is accidentally exposed for 2.0 minutes to a 21-mCi source of beta radiation from a…

A: (a) Let M, T, and R denote the person’s mass, the time for exposure, and the radioactive sample’s…

Q: For the radioactive isotope strontium-90, k is 2.47 x 10-2 years -1. If the original amount of…

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Q: The binding energy per nucleon of Li-7 and He-4 nuclei are 5.60 MeV and 7.06MeV respectively. In the…

A: The binding energy per nucleon is define as the binding energy of the nucleus divide by the number…

Q: The counting rate from a radioactive source is 4000 counts per second at time t=0. After 10 seconds,…

A: We know that activity is  N=N0e-λt and  T1/2=ln2λ=0.693λ Using the above formula the problem can be…

Q: A beta particle is an electron. True or false? During alpha decay the atomic number decreases by two…

A: Given:- statement1:-A beta particle is an electron. statement2:-During alpha decay the atomic number…

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…

Q: Iodine-131, a beta emitter, has a half-life of 8 days. A 2-gram sample of initially pure iodine-131…

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Q: Experimentally, it is found that natural potassium emits 31 beta particles per second per gram and…

A: The objective of the question is to determine the half-life period of K-40 using the given data…

Q: A living specimen in equilibrium with the atmosphere contains one atom of ¹4℃ (half-life = 5 730 yr)…

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Q: A 60-kg person accidentally ingests a small source of alpha particles (RBE=15). The activity of the…

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Q: A mummy is discovered in a re- cently unearthed tomb. Based on the other artifacts in the tomb, it…

A: