The half-life of 23$U, an alpha emitter, is 7.1 x 10° yr. Calculate the number of alpha particles emitted by 1.0 mg of this nuclide in 1.0 minute.

Q: A 75 kg patient swallows a 30 μCi beta emitter with a halflife of 5.0 days, and the radioactive…

A: The number of radioactive nuclei did the patient swallowed be calculated as,…

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: 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: Two nuclei have mass numbers in the ratio 27:125. What is the ratio of their nuclear radii?

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Q: Plutonium-239 (t1/2 = 2.41x104 yr) represents a serious nuclear waste hazard. If seven half-lives…

A: Given that, The half-life of Plutonium-239 is t1/2 = 2.41 x 104 yr We need to find the time that…

Q: Use the isotope table (either linked here or previously printed out) to determine the mass defect of…

A: Given:-  Neon -20 atomic no. of neon (Z) = 10 Δm = mass defect [atomic mass unit (amu)] mp = mass of…

Q: How much energy is needed to remove a neutron from a 236^U nucleus? Is this energy greater or less…

A: Given: nucleus = U236 we have to calculate energy required to remove one neutron from U236 Start by…

Q: Radioactive indium-111 has an effective half-life of 2.5 days.If a dose with an activity of 3.0 mCi…

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Q: Technetium-99 is an unstable isotope. Given a half-life of 8.01 hours, what is the activity (in…

A: Determine the decay constant.

Q: Two nuclei have mass number in the ratio 1 : 3. What is the ratio of their nuclear densities?

A: Given that, Two nuclei have the mass number in the ratio 1 : 3. The nuclear densities of nuclei A is…

Q: A radiation worker stands 35 cm away from a radioactive source of 30 mCi (11.1 GBq) 99mTc (?? for…

A: The equation of exposure rate is given as,

Q: A radiation worker stands 35 cm away from a radioactive source of 30 mCi (11.1 GBq) 9mTc (k, for…

A: The exposure rate is given by

Q: The half-life of Erbium-172 is 49.3 hours. What is the hourly decay rate? Express the result to four…

A: Given data The half-life of erbium 172 is given as t = 49.3 hours.   Now, the hourly decay rate is…

Q: 5.1 A sample of the isotope 1311, with a half-life of 8.04 days, has an activity of 10 mCi at the…

A: Given , half-life of I131 = 8.04 days Activity = 10mCi Upon receipt of I131 in medical laboratory ,…

Q: What is the dose in mSv for: (a) a 0.1 Gy x-ray?(b) 2.5 mGy of neutron exposure to the eye? (c) 1.5…

A: The dose in Sv is given by, a) The energy radiation for X-ray is 1RBE. Thus,

Q: Two nuclei have mass numbers in the ratio 2 : 5. What is the ratio of their nuclear densities?

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Q: the nuclear binding energy of Au-197 is found to be 1576 MeV and the binding energy per nucleon is 8…

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Q: Binding energy per nucleon for an element is 7.14 MeV. If the binding energy of the element is 28.6…

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Q: Approximately what is value of A for a nucleus whose radius is 4.7x10^-15 m

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Q: 209 Bi is the heaviest stable nuclide, and its BE / A islow compared with medium-mass nuclides.…

A: For , Number of protons,   Number of neutrons, Mass of proton, Mass of neutron, Mass of Bi…

Q: Calculate the nuclear binding energy per nucleon (in J/nucleon) for the nuclei 171X with a mass…

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Q: What time interval elapses while 51.0% of the radioactivity of a sample of 7233As disappears, as…

A: As per given data, 51% of the radioactivity of a sample disappears.

Q: The half-life of iodine-131 is 8 days. How long does it take for the initial activity of 4500 kBq /…

A: half life of iodine 131 = 8 days Initial activity (Ao) = 4500 kBqm3Final activity (A) = 65 kBqm3

Q: A nuclide whose "generic" symbol is 6430X would have protons and neutrons.

A: The generic symbol of a nuclide is given as X3064.

Q: . Calculate the average binding energy per nucleon for Vanadium, V (atomic mass = 50.943962 u). MeV

A: Write a given values of this question. atomic mass=50.943962amu  V2351 has 23 electron, 23 protons…

Q: Explain why 231-Th-90 is likely to be a beta minus emitter

A: Why 231-Th-90 is likely to be a beta minus emitter.

Q: Calculate the radiation dosage (in rads.) for an 77-kg person that is exposed for 6 .0 seconds to a…

A: The energy released in the form of beta radiation is

Q: 1.5 The binding energy per nucléon for °Fe is 8.8 MeV per nucléon. Estimate the energy released per…

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Q: What is the half-life of a radioactive isotope if the activity of a sample drops from 6,080 cpm to…

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Q: A reaction rate is the number of reactions per time unit in a medium irradiated by a neutron flux…

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Q: Calculate the binding energy per nucleon of 4He , the alpha particle.

A: The total binding energy is  B.E=∆mc2 where ∆m is the mass defect and c is the speed of light.  The…

Q: What is the binding energy per nucleon of the tritium (H3) nucleus (1u=931.5 MeV; Tritium atomic…

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Q: A radiation worker stands 10 cm away from a radioactive source of 55 mCi 57Co. Calculate the…

A: It is given that,

Q: iodine 131 has a half life of 8.04 days if you start with a radioactivr I 131 sample having an…

A: Half life of I-131 isotope = 8.04 days Initial activity (Ao) = 40 micro Ci Final activity (A) = 4…

Q: The half-life of a radioactive nuclide is 20 years. If a sample of this nuclide has an activity of…

A: Formula of radioactivity is as follows: I=I0e-λt…

Q: An iodine isotope with a first order nuclear decay rate has a half life of 8 days. (time for half…

A:

Q: A 75 kg person receives a whole-body radiation dose of 2.4 * 10-4 Gy, delivered by alpha particles…

A: Given information: Here, rd is the radiation dose, m is the person’s mass and RBE is the factor.

Q: The activity of a particular radioactive nuclide falls from 1 × 10! Bq to 2 x 1010 Bq in 10 hours.…

A: Activity of a particular radioactive nuclide falls from, A0 = 1×1011 BqAt =2×1010 Bqat, t = 10 hours

Q: A sample of 1.0 × 1010 atoms that decay by alpha emission has a half-life of 100 min. How many alpha…

A: According to the law of radioactive disintegration, Nt=N012tt12 Find the number of emitted alpha…

Q: A dose of 8.60 mCi of a radioactive isotope is injected into a patient. The isotope has a half-life…

A:

Q: The half-life of the radioactive isotope is 2.1 days. If the activity of the substance is initially…

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Q: The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10 hours.…

A: Given, The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10…

Q: A radioactive sample contains 3.2. atoms of a particular nuclide and emits 3600 a- particles per…

A: Given:Radioactive sample,α=3.2×1018 atomsRate=3600 perticle/secondFind the decay constant,k of the…

Q: If the activity of a sample of radioactive material is initially 10 Ci and the half-life of the…

A: A=A0e-λt=A0e-0.693t1/2t