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- 5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a. Write an exponential function to model this situation and define each variable. ( b. Determine what fraction of a sample of Krypton-85 will remain after 86.08 years. State the answer as an exact fraction value. ( C. Determine how long will it take for a sample of Krypton-85 to decay to 1/64 of its original mass. Round your answer to the nearest hundredth of a year.11. Calculate the energy released in the reaction shown below. Li+ n → He+ H Particle Mass (u) Li 6.01513 in 1.00867 4.0026 He 3.01604c) Complete the following decay reaction to show sodium-24 undergoing ߯ decay. First identify the unknown daughter nucleus (?).. and then name the subatomic particle that completes the reaction. 24Na → (?) + v + (subatomic particle) Enter the mass number A = Enter the atomic number Z = Enter the chemical symbol: Name the subatomic particle: A/ N
- An ancient artifact is found to contain 240 g of carbon and has an activity of 479 decays/min. Part A Q Search What is the approximate age of the artifact, to the nearest thousand years? (The rate of decay of carbon in living matter is R 16 decays/(g. min).) Express your answer to the nearest thousand years. 15| ΑΣΦ Submit Part B What would its initial activity have been? Ro= Request Answer 15. ΑΣΦ P Pearson W ? ? y Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | decays/min Revie 10:02 AM 12/12/2022Nuclear Physics Item 12Answer the following questions regarding the radioactive isotope radium-226. A.Write a nuclear equation for when this nucleus undergoes beta decay. B.What is the binding energy of a radium-226 nucleus? The mass of radium-226 is 226.02541 amu. C.A rock obtained by geologists was found to obtain 1.38 mg of radium-226. Later studies confirmed that 922 years prior, the rock contained 34.6 mg of radium-226. How many half-lives have elapsed? D.Based on your answer to Question C, determine the half-life of radium-226. E.Based on your answers to Questions C & D, determine the rate constant of the beta decay of radium-226
- Part A A sample of U (T1= 1.59 × 10° yr) contains 2 233 6.10 x 1018 nuclei. What is the decay constant? Express your answer using three significant figures. ? = s-1 II5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a. Write an exponential function to model this situation and define each variable. ( b. Determine what fraction of a sample of Krypton-85 will remain after 86.08 years. State the answer as an exact fraction value. ( C. Determine how long will it take for a sample of Krypton-85 to decay to 1/64 of its original mass. Round your answer to the nearest hundredth of a year.5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a. Write an exponential function to model this situation and define each variable. ( b. Determine what fraction of a sample of Krypton-85 will remain after 86.08 years. State the answer as an exact fraction value. ( C. Determine how long will it take for a sample of Krypton-85 to decay to 1/64 of its original mass. Round your answer to the nearest hundredth of a year.
- 1. What is the binding energy per nucleon for ?? 1327 (Aluminum – 27)? Note: A neutral ?? 1327(Aluminum – 27) atom has a mass of 26.981539 u; a neutral hydrogen atom has a mass of 1.007825 u; a neutron has a mass of 1.0086655 u; and a proton has a mass of 1.007277 u. Also, 1 u = 931.494 MeV/c2.a. 8.3 MeVb. 6.7 MeVc. 5.4 MeVd. 3.4 MeVe. 2.8 MeV1. The element Xe-137 undergoes beta-minus decay. Write the chemical equation for this radioactive decay. 2. The element 1-108 undergoes alpha decay. Write the chemical equation for this radioactive decay 3. The half-life of Cs-116 is 0.70s. How long would it take for 7.0 moles of this isotope to decay to just 2.0 moles?6. The amount of radioactive material present at time t is given by A =?0??? where ?0 is the initial amount, k < 0 is the rate of decay. Radioactive substances are more commonly described in terms of their half-life, or the time required for half of the substance to decompose. Determine the half-life of substance X if after 600 years, a sample has decayed to 85% of its original mass.