activity

Q: Uranium -238 decays in a series of steps to Pb-206. When the material is very old, one can treat the…

A: Radioactive decay follows 1st order reaction.  Given the half-life, t1/2 = 4.50*109 yr

Q: The half life for the decay of carbon-14 is 5.73 × 10’ years. Suppose the activity due to the…

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Q: How long (in hours) would it take to disintegrate 3.17 × 1017 atoms from a 12.0-mCi (millicurie)…

A: Activity = 12.0 mCi = 12 * 10-3 Ci

Q: The isotope iodine-131 is used as a tracer in medical imaging. It has half-life of about 8 days.…

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Q: What is the specific activity (in Ci/g) if 9.1 g of an isotope emits 4.13× 108 B particles per hour?…

A: Given mass  = 9.1 gram  isotope emits 4.13 ×10 8  beta-  particles per hour  To find :  The specific…

Q: h for dellivery from the supplier? Assume that the atomic mass of Ca is 47.0 u.

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Q: Table III-C. Type of Radioactive Decay for Some Radioisotopes Unstable Isotope Prediction Confirmed…

A: Nuclear chemistry. Radio active disintigration.

Q: QUESTION 7 A radioactive isotope, Z-109, has a half-life of 62.3 years. How many years (y) will it…

A: First of all by using half life period, we can calculate the the rate constant k and then by using…

Q: What is needed to balance the nuclear fission reaction below?  n+U→Te+ ? +2n

A: Nuclear fission reaction is a reaction in which parent nucleus breaks down and forms different…

Q: Consider 1 mole (238 gm) of isotopically pure uranium U-238. Calculate its activity for the next 1…

A: Given: The molar mass of uranium = 238 g/mol. The given mass of uranium = 238 g. The number of moles…

Q: initial activity of the sa

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Q: The nuclide ²⁰⁰₅₀X is most likely to decay by ___ A) alpha decay. B) electron capture. C)…

A: The N/Z ratio determines the most likely mode of decay. Given nuclide is 20050X

Q: ty due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from…

A: Answer: the half life carbon -14 is = 5.73 × 103 years.  Activity of the sample in initial( Ao)=…

Q: A rock contains 0.438 g of Pb-206 to every 1.00 g of U-238. The rock contained no lead at the time…

A: The amount of uranium-238 present initially is calculated as,

Q: In order to investigate the age of a mineral sample believed to be millions of years old, which…

A: Please find your solution below : Isotopes are defined as the members of family of same element that…

Q: Phosphorus-30, which has a half-life of 150 seconds, decays by positron emission. How long will it…

A: Since the decay reactions are first order. Hence half life = ln(2) / K  where K = decay constant…

Q: A sample of drinking water collected from a suburban Boston municipal water system in 2002 contained…

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Q: What isotope results from a decay of the americium-241 in smoke detectors?

A: Isotope  They are the different forms of any chemical element in which the number of protons are…

Q: The half life for the decay of carbon-14 is 5.73 × 10° years. Suppose the activity due to the…

A: Given: Half-life of carbon-14 decay = 5730 years. Activity of carbon-14 in the sample = 90 Bq. And…

Q: In radioactive dating using carbon-14 and carbon-12, why is it essential that carbon-12 be a stable…

A: In radioactive dating using carbon-14 and carbon-12, carbon-14 is considered the radioactive isotope…

Q: The radioactive isotope 212Pb has a half-life of 10.64 h. A sample containing this isotope has an…

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Q: Krypton-81m is used for lung ventilation studies. Its half-life is 13 ss. How long does it take the…

A: The objective of this question is to determine the time it takes for the activity of Krypton-81m to…

Q: A 22-gram sample of Aluminum-25 (half-life of approximately 7.2 seconds), was left undisturbed for 1…

A: Here we have given a radioactive Aluminium-25  Half life is 7.2 second Asked about decay constant…

Q: This reaction is an example of 210 Po  --->  206 Pb  +  ________ beta emission electron capture…

A: Alpha decay: In alpha decay, nucleus emits alpha particle which has two neutrons and two protons. It…

Q: A sample of cesium-137 has an activity of 8.00 mCi.  How many micrograms of Cs-137 are present in…

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Q: 60-Co beta decays with half- life of 5.27 years (1.66 x108 sec) into 60NI, which then promptly emits…

A: a) The activity of a sample is given by A = N × ln2t12 Here, the half-life is given to be = 5.27…