How many of the nuclei of a radioactive sample containing 2048nuclei decay in 3 years, if its half life is given to be 6 months?

Q: The half-life of 26?? 59 is 44.6 days. How long will it take for 95.0% of a sample of this nuclide…

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Q: If the half-life of a parent material is 10 Ma, and about 88% (rounded) has decayed to daughter…

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Q: How much time is required for a 6.25-mg sample of 51Cr to decay to 0.75 mg if it has a half-life of…

A: The initial amount of the sample = 6.25 mg The amount of sample after time t = 0.75 mg. The…

Q: -33. The number of radioactive nuclides in a sample decays from 1.00 × 1020 to 2.50 × 10º in 10.0…

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Q: 31. Uranlum 235 decays to Lead 207 with a half-life of 0.7 billion years. What Is age of a rock…

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Q: Carbon-14 has a half-life of 5730  years . In a plant fossil, you find that the  14C  has decayed to…

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Q: Fluorine-18 is a radioactive isotope commonly used in medicine.  It has a half-life of 110 minutes.…

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Q: Carbon-14 has a half life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: Given that, half life , t12= of 5730 years. and  14C has decayed to 1/8.00 of the original amount

Q: What is the nuclear binding energy per nucleon of the most stable isotope Iron-56 in terms of…

A: Nuclear binding energy can be defined as the minimum amount of energy required to break down an…

Q: 3) 120g of Chromium-48 decays. After 6 half-lives, how much of the original nuclei would remain?

A: Given,  Initial amount of Chromium - 48 is 120g. After 6 half lives the original nuclei would remain…

Q: Calculate the mass defect and binding energy for 13C atom.

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Q: What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 57.1 h?

A: The half-life of the isotopes can be described as the time at which the amount of the activity…

Q: 1. What is the half-life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours

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Q: 2. If you started with a sample of 600 radioactive nuclei, how many would remain undecayed after 3…

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Q: A 26.00-g sample of water containing tritium, 31H, emits1.50 x 103 beta particles per second.…

A: In radioactive decay, radioactive atom's nuclei (unstable) eject energy as well as charged particles…

Q: A radioactive sample contains 1.55 g of an isotope with ahalf-life of 3.8 days. What mass of the…

A: Radioactive isotopes may occur naturally or be artificially produced. Radioactive isotopes possess…

Q: An unknown radioactive element decays into non-radioactive substances.  In 660 days the…

A: Rate constant (k)= 2.303/t log 100/49 So k = (2.303/660) ×0.3098 =0.0011 days ^-1

Q: rbon decays at a rate proportional to the amount present.

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Q: A sample of Tl-201 has an initial decay rate of 5.88 × 10^4/s. How long will it take for the decay…

A: First, the rate constant value is determined by using the given half life period.

Q: The radioisotope potassium-40 decays to argon-40 by positron emission with a half-life of 1.3 × 109…

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Q: An unknown radioactive substance is currently decaying. Initially, the sample contained 16.1g of the…

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Q: Nuclides with too many neutrons to be in the band of stability are most likely to decay by what…

A: Nuclides with too many neutrons lie above in the band of stability. This nuclie which has more…

Q: The most likely decay mode (or modes) of the unstable nuclide ¹¹C would be A) positron…

A: The nuclear reactions are a type of chemical processes which lead to the formation of some new…

Q: How many of the nuclei of a radioactive sample containing 2048 nuclei decay in 3 years, if it's half…

A: Half life of a radioactive sample is the time in which half of the sample is decayed i.e. 50% of the…

Q: Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.20…

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Q: A radioactive decay series that begins with 23290Th endswith formation of the stable nuclide…

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Q: 28Mg lies above the band of stability- its most likely mode of decay is what?

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Q: If one-trillionth of the atoms of a radioactive isotope disin-tegrate each day, what is the decay…

A: One trillionth of radioactive isotope decay takes place in a day. I trillion = 1.0 x 1012  The…

Q: 9) Complete the following scheme for 4K decays: (B decay or electron capture or a decay)

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Q: The half life of a specific radionuclide is 8 days. How much of an 80mg sample will be left after 24…

A: There are two methods to solve it : Method (1): The half life is the time in which any compound is…

Q: True or false? During one half-life, the mass of a radioisotope is reduced by half. Explain.

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Q: Ruthenium-106 (106Ru) is used to treat melanoma in the eye. This isotope decays by β– emission with…

A: In general, Number of proton is equal to the number of atomic number.The atomic number of is 44,…

Q: How much energy must be supplied to break a single 21Ne nucleus into separated protons and neutrons…

A: Nuclear binding energy is the energy required to separate an atomic nucleus completely into its…

Q: What is the half life of a radioactive sample, if3/4of its nuclei decay in 2 years?

A: The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass = 1The…

Q: What is the half‑life of an isotope that decays to 3.125%3.125% of its original activity in 41.8 h?

A: All radioactive decay follows first order kinetics. The half-life t1/2 of the radioactive decay is…

Q: A radioactive isotope has a half-life of 84.5 minutes. How long will it take for the radiation from…

A: Half life t1/2 = 84.5 min = 5070 s

Q: Q3 Radium-224 decays through the pathway a, a, a, ß, a, ß. What intermediates are formed in this…

A: Radioactive decay is the process of breakdown of radioactive nuclei to smaller nucleii till it is…

Q: the half life of molybdenum -99 is 67 hr. a 200 ug quantity decays, over time, to 25 ug. how much…

A: Here given, Initial amount (N0) = 200 ug Amount left undisintegrated (N) = 25 ug Half life (t1/2) =…

Q: A theoretical isotope known as Du-30 has a half life of 6 months. The amount decreased from 1.50M to…

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Q: The isotope 261-Lr decays by a emission with a half-life of 2.7 min. How many minutes will it take…

A: As we know the Decay equation: λ=1tlnaoa a0= Initial concentration a= Concentration left after time…

Q: The decay constant or the beta decay of ^99 43TC was found to be equal to 1.0x10-13/s. What is the…

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Q: The following isotopes are all stable : 20Ne, Ne, 22Ne 10+ 10- While the following is not, so what…

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Q: A patient is given 0.050 mg of technetium-99m, a radioactive isotope with a half-life of about 6.0…

A: decay constant , k = 0.693t12 = 0.6936 hour-1  integrated rate equation for radio active decay (…

Q: Strontium-89 is a beta emitter with a half-life of 50.6 days that is used in bone cancer treatment.…

A: Radioactive decay follows first order kinetics. t1/2 = 0.693/k   (where, k = decay constant) t =…

Q: A patient is given 0.050 mg of Tc-99. How long until the isotope decays to 6.3 x 103 mg? (Half life…

A: Given  Mass of Tc-99  [ A0 ] = 0.050 mg  Remaining Tc -99 [ At ] = 6.3 × 10-3 mg  Half life ( t1/2 )…