AlIMS 2016 36. Initial number of nuclei of a radioactive substance is 5 x1016 and half life is 10 yrs. Find number of nuclei decayed in 5 yrs. (1) 2 x 1016 (2) 1.5 x 1016 (3)3.5 x 1016 (4) 2.5 x 1016 ..4 י
Q: A radioactive material produces 3.522E+3 decays per minute at one time, and 5.47 h later produces…
A:
Q: 1. The decay of radioactive substance is given by 7 N = Noe (1), where N is the number of atoms…
A:
Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
A:
Q: By READING the R vs t graph shown below, determine R, & the half-life. R (x10¹2 decays/h) 80 60. Ro…
A: Given From the given graph of Decay rate vs time R0 is the rate of decay at t =0 Therefore , R 0…
Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
A:
Q: the decay constant or the beta decay of ^99 43Tc was found to be equal to 1.0x10-13/s. What is the…
A:
Q: The radioactive isotope 209 Po has a half-life of 103 years. How long would it take 84 for only 4.00…
A: Given: The half-life time is 103 years. The remaining sample is 4 g. The total amount of the sample…
Q: Suppose the activity due to the radioactive decay of the carbon-14in a tiny sample of an artifact…
A: The activity of fresh wood sample is The activity of old wood sample is The half life of carbon 14…
Q: Two radioactive nuclides, A and B, are presented at t = 0 with the number of nuclei of A equal twice…
A: At , t = 0 , the number of A nuclei is twice the no of B nuclei. Na(0) = 2× Nb(0) The lifetime of…
Q: Mass spectrometric analysis of potassium and argon atoms in a Moon rock sample shows that the ratio…
A:
Q: lease answer the following question(s): 1. The decay of radioactive substance is given by -t rch…
A:
Q: A radioactive sample has a decay constant of 2.97 x 10 s¹¹. Estimate the half-life.
A: Unstable nuclei decay into a stable state. This process is called radioactivity. The rate at which…
Q: 1. The decay of radioactive substance is given by -t T N = Nᵒe (1), where N is the number of atoms…
A: You are using incorrect symbol for Tau (decay constant).
Q: Determine the half-life (in s) of a radioactive sample that contains 1.10 x 105 atoms of the…
A:
Q: A radioactive sample studied in a lab is found to have a half-life of 48 hours. If the initial…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The half-life for a…
Q: A sealed box containing alloys of metal A and Metal B consisting of the same parts accordingly.…
A: We need to find the age of the alloy based on the given information.
Q: The decay of radioactive substance is given by N = Noe (1), where N is the number of atoms present…
A:
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: A radioactive sample is monitored with a radiation detector to produce 7640 counts per minute.…
A: Initial count is Final count is Time is Find:(a) Decay constant of the sample.(b) Half-life time.
Q: What is the Decay Rate (k), if the Half Life is 10.5 days?
A:
Q: 8. The half-life for a radioactive isotope is 4.00 × 10⁹ yr. Determine the age (in years) of a rock…
A:
Q: A radioactive material produces 4.386E+3 decays per minute at one time, and 7.57 h later produces…
A:
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: Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy…
A: The amount remaining is equal to the original amount times 1/2 raised to the of half-lives that have…
Q: A radioactive isotope has a half-life of 72.0 min. A sample is prepared that has an initial activity…
A: Given Data: The half-life of a radioactive isotope is, t1/2=72.0 min The initial activity is,…
Q: 1.5 The binding energy per nucléon for °Fe is 8.8 MeV per nucléon. Estimate the energy released per…
A:
Q: A radioactive sample studied in a lab is found to have a half-life of 25 hours. If the initial…
A: Radioactive decay is the process by which an unstable atomic nucleus spontaneously emits particles…
Q: A radioactive sample has a half-life of 28 mins. If the initial amount of sample was 2 g, estimate…
A: Radioactive decay takes place when an atomic nucleus becomes unstable. The rate of decay is known as…
Step by step
Solved in 2 steps with 2 images
- A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 1.19 kg sample of carbon from the wood has an activity of 2340 decays per minute. Find the age of the charcoal. Living mate- rial has an activity of 15 decays/minute per gram of carbon present and the half-life of 14C is 5730 y. Answer in units of y. I got 7300.99 but that wasn’t right Can you please help!20.0 hours after being ingested 74.5 % of the original radioactive atoms have decayed or been eliminated. If the biological half-life is known to be 35.0 hours, what is the physical half-life of this isotope? State the time in hours to 1 decimal places but do NOT include units in your answer. Your Answer:A radioactive sample has a decay constant of 49.15x10-12 s¹. Estimate the half-life.
- A sample of radioactive material has a half-life of 12 hours. If the initial sample contained 6.2x10¹3 radioactive nuclides estimate the number of radioactive nuclides present in the sample after 5 hours.The amount of carbon-14 found in a fossil of a tree is around 0.05% when compared to fresh wood of the same kind. Estimate the age of the fossil.Iodine-131 is used in the form of sodium iodide to trwat cancer of the thyroid. The isotope has a half life of 8.04 days. If you begin with 25.0-mg of radioactive 131I, what mass remains after 32.2 days?