13 The isotope N has a half-life of 9.96
Q: Strontium is chemically similar to calcium and can replace calcium in bones. The radiation from 90Sr…
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Q: A 44.5 g sample of carbon has an activity of 8.55 decays per second. How old is it? Please give your…
A: Given data The mass of the sample of carbon is given as m = 44.5 kg. The number of decays is given…
Q: 1. Calculate the binding energy (in MeV) per nucleon for an a-particle (He nucleus), given that the…
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Q: Bismuth, 214Bi decays by alpha decay with a half-life of 19.7 minutes. What is its decay constant?…
A: Formula of half-life of radio active element is as follows: T12=0.693λ…
Q: A piece of bark is made up of carbon. It emits 7000 electrons per minute. Only the carbon 14 isotope…
A: number of electrons per minute = 7000 isotopic abundace of C-14 = 1.3×10-12
Q: A geologist finds an old rock and wants to determine its age using rubidium-strontium dating. This…
A: The age of the rock is 1.36 x 10¹⁰ years
Q: 6. The bismuth-209 nucleus has a binding energy per nucleon of 7.6154 MeV. (1 MeV is 1.60 × 10-13…
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Q: An 1 g sample of a radioactive element takes 83.92 million years to reduce into 1 µg. Calculate the…
A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…
Q: Strontium is chemically similar to calcium and can replace calcium in bones. The radiation from ⁹⁰Sr…
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Q: 190- Some nucleus of ¹9X (atomic mass = 189.96182 u) undergoes decay to become (atomic mass =…
A: The mass of the parent nucleus is 189.96182 u. The mass of the daughter nucleus is 189.95844 u.
Q: The cadmium isotope 109Cd has a half-life of 462 days. A sample begins with 1.0 × 1012 109Cd atoms.…
A: According to the relation, N=N0etτ N0 is the initial number of Cd atoms, N is the number of atoms…
Q: 11. The half-life of Uranium-237 is 5.83 x 105 seconds. What is the decay constant?
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Q: A pure sample of 226 Ra contains 2.0 x 10^14 atoms of the isotope. If the half life of. 226 Ra = 1.6…
A: Given that, No. of atoms of a pure sample of 226 Ra is 2.0 x 1014 atoms. The half-life of the sample…
Q: he isotope neptunium-229 ( 229 93Np) undergoes alpha (4 2He) decay. Write the reaction equation and…
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Q: radioactive sample initially undergoes 12.0×10^4 decays/s. Twenty-four hours later, its activity is…
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Q: A radioactive sample containing approximately 6.52×10¹3 radioactive nuclides has a half-life of 5730…
A: Radioactive nuclides are those nuclides that are unstable. This happens due to the mismatch between…
Q: An 10 g sample of a radioactive element takes 5432.6 years to reduce into 1 g. Calculate the…
A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…
Q: The radioactive isotope (183-Ta) has a half life of 5.11 days. A sample containing the isotope as an…
A: Given data: Half-life t12=5.11 days Initial activity R0=4.5×108Bq
Q: The steps below show three of the steps in the radioactive decay chain for 232 90Th. The half-life…
A: Given: The steps below show three of the steps in the radioactive decay chain for 232 90Th. The…
Q: After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an…
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Q: What is the the total binding energy of o 28NI. It isotope mass is 59.930786 u. The mass 60 of a…
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Q: The half-life of a radioactive isotope is known to be exactly 1 h. a) What fraction of a sample…
A: Given in question - Half-life (T) = 1 hour Solution: Step1 - Here we will understand the concept…
Q: The nucleus O has a half-life of 122.2 s; 0 has a half-life of 26.9 s. Assume, that at some time a…
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Q: 10. The radioactive isotope (82Sr) has a half-life of 25.4 days. A sample containing this isotope…
A: Given, The half-life of radioactive elements is 25.4 days The initial activity, R=4.50×108 Bq
Q: 8. The half-life for a radioactive isotope is 4.00 × 10⁹ yr. Determine the age (in years) of a rock…
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Q: A radioactive material produces 4.386E+3 decays per minute at one time, and 7.57 h later produces…
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Q: The number of radioactive nuclei present at the start of an experiment is 5.38 x 1015. The number…
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Q: The half-life of radium-226 is 1.6 x 10 years. How long will it take for 20.0 mg of radium-226 to…
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Q: The half-life for the a decay of uranium 2U is 4.47 x 10° yr. Determine the age (in years) of a rock…
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Q: Measurements on a certain isotope tell you that the decay rate decreases from 8318 decays/min to…
A: Decay rate of any nuclide at any time is directly proportional to the number of active nuclides at…
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- 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:The polonium isotope 210/84 Po undergoes alpha decay to become an isotope of lead. The atomic number of this isotope is and the mass number isYou have an isotope with a decay constant of 2.48 x 10-3 s-1. What is the half-life of this isotope?
- An 8 g sample of a radioactive element takes 8.42 million years to reduce into 2 g. Calculate the half-life and identify the element.24. Given the atomic mass of Beryllium-11 is 11.021658 u, what is the nuclear binding energy of Beryllium-11? (mproton = 1.0078251, mneutron = 1.0086649, c2 = 931.5 eV/u) 63 ev 1004 ev 959 eV 65 eV3. (07.03 MC) The isotope cobalt-60 has a nuclear mass of 59.933820 u. Calculate the binding energy per nucleon of cobalt-60 using the following information. Mass of Proton: 1.007825 u Mass of Neutron: 1.008665 u 1 u = 931.5 MeV
- An investigator collects a sample of a radioactive isotope with an activity of 370,000 Bq. 48 hours later, the activity is 120,000 Bq. What is the half-life of the sample?The isotope 2712Mg has a half-life of 9.46 min. Determine the time interval (in min) required for the activity of a sample of this isotope to decrease to 37.0% of its original value. min1Elements with atomic numbers greater than _______ will undergo radioactive decay. 77 83 80 78 2The half-life of Silver-105 is 3.57 x 106 seconds. A sample contains 5.78 x 1017 nuclei. What is the decay constant for this decay? 1.94 x 10-7 s-1 1.37 x 10-7 s-1 1.54 x 10-7 s-1 1.73 x 10-7 s-1 3Which of the following are true regarding beta plus decay? (Select all that apply) emits a neutrino emits an antineutrino the nucleus emits a high-energy positron the nucleus emits a high-energy electron