Check Your Understanding Carbon-15 has a half-life of 2.45 seconds. Calculate the decay constant of carbon-15 and compare it to that of carbon-14.
Q: How many half-lives have passed if about 3% (rounded) of the original parent material is left?
A: How many half-lives have passed if about 3% (rounded) of the original parent material is left?
Q: A short-lived radioactive isotope has a half-life of T1/2 = 6.06 seconds. What is its decay constant…
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Q: Using appropriate formula determine the decay constant (λ) for the parent-daughter isotope pair,…
A: A parent-daughter isotope pair is The half-life time is Find:Decay constant.
Q: If there are 20 mmol of the radioactive isotope 3H (half-life 12 years) at t = 0, how much 3H remain…
A: Initial concentration of radioactive element is Half-life time is Find:(a) Concentration of at…
Q: A radioactive source is marked as containing 5mCi, but now measures 3.4 mCi. If the half life is 5.2…
A: Calculate the decay constant. λ=0.693t1/2=0.6935.2 =0.13327
Q: complete the table and calculate the mass defect and binding energy for K39 c)explain the…
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Q: Consider the following three atoms: Ar (protons = 18, neutrons = 21, atomic mass = 38.964313 u), K…
A: The stability of an isotope is determined by the neutron-to-proton ratio. A stable nucleus generally…
Q: Calculate the nuclear binding energy for iron-58, which has a nuclear mass of 57.933817u. Take the…
A: Given data- iron-58 has atomic number z=26, so proton (p)=26 and neutron (n)=32 1 amu =1 u=1.66 x…
Q: Assume that the decay rate for Carbon 14 is k=0.00012. If charcoal found in an ancient fire pit…
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Q: A) How much mass is left in a piece of animal skin after 17,145 years when a newly made piece of…
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Q: the sample must be due to radioactive decay. With all of this in mind, if we find that a rock…
A: This problem can be solved using radioactive decay concept.
Q: Using the Line of Stability graph, predict the type(s) of decay that each of the following…
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Q: A particular rock is thought to be 250 million years old. If it contains 4.51 mg of 238U, how much…
A: Radioactivity is a process in which unstable heavy nuclei convert into more stable lighter nuclei…
Q: Calculate the half-life of Th-232 which has a decay constant of 49.15×10-¹2 s²¹.
A: The rate at which unstable radioactive nuclei decay in a sample of material is called the activity…
Q: The half-life of a radiotracer is 3 hr. (i) Determine the decay constant of the radiotracer, (ii)…
A: Given, half life of radio tracker is, t12= 3hr i) So decay constant is, λ = ln2t12=ln23hr=0.23 hr-1…
Q: Two treads balls with masses 2 kilogram and three kilograms are suspended on threads of 70…
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Q: C-60 decays with a hlaf life of 5.27 years to prosuce Ni-60 , decay constant 0.131 How long does…
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Q: An ancient club is found that contains 140 g of pure carbon and has an activity of 4 decays per…
A: Given Mass of carbon in ancient club = 140 gm Carbon activity = 4 decays /sec Living trees ratio 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
Q: Xe-124 an isotope of xenon has the highest half-life of 1.8 × 1022 yrs. Estimate the time it would…
A: When a nucleus becomes unstable it will undergo radioactive decay to attain a stable configuration.…
Q: Th232 has a half-life of 14 billion years, it is the longest-lived isotope of thorium. Calculate its…
A: Unstable nuclei will become stable by radiating energy, this process is called radioactive decay.…
Q: was 8.0:
A: The solution can be given as :-
Q: , how old is a sample if two-thirds of it is now the daughter isotope? What type of decay is…
A: We know , N=N0e-λt Where, N= remaining part of the sample N0=Initial amount of the sample λ=decay…
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- How much mass of a decaying 1kg sample with a half-life of 3hours will be left after 1 day has passed?Modern household smoke detectors contain a tiny speck of the element Americium (Am, atomic number 95, atomic mass 241), which has a half-life of 432 years and an activity of (roughly) of 37,000 decays per second. a) What is the approximate mass of this speck? (Hint: the atomic mass of this isotope is approximately 241.06 u). b) This isotope is an alpha emitter. Is its radiation likely to be a hazard to the household members while the smoke detector is on the ceiling? Explain.Find question in Image.
- The theory of nuclear astrophysics is that all the heavy elements like uranium are formed in the interior of massive stars. These stars eventually explode, releasing the elements into space. If we assume that at the time of explosion there were equal amounts of 235U and 238U, 235 how long ago were the elements that formed our Earth released, given that the present U/238U ratio is 0.007? (The half-lives of 235u and 238U are 0.70 × 10° yr and 4.47 x 10° yr, respectively.) yearsa radioactive material has a half-life of eigth days. how long will take for the material to be reduce on one-sixteeth (1/16) of its original mass? a radioactive sample has a decay constant of 0.219/minute. what is its half-liofe?, if at the start of an exeperiement, there are 3.2x10 nuclei, how much wilkl remain after 1 hour?Europium-141 undergoes a radioactive decay according to the pictured equation (a) Balance the equation for the decay (b) Calculate the reaction energy (c) Is the reaction alpha, beta, or neither type of decay
- Show what is meant by the radioactive half-life of a radionuclide, using a suitable sketch graph. Mark two half-lives on your graph. Also use your graph to show the relationship of the halflife with τ, the decay constant, or characteristic decay time and τ−1, the decay rate.The isotope ¹C has a half-life of 5730 years. What percent (N/No) of the ¹4C in a buried animal 14 bone will remain after 45,000 years?