A certain radioactive isotope decays to one fourth of its original amount in 4.0 hours. How long would it take for 20% of it to decay
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A certain radioactive isotope decays to one fourth of its original amount in 4.0 hours. How long would it
take for 20% of it to decay?
A. 0.40 hours
B. 0.56 hours
C. 0.64 hours
D. 0.85 hours
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- Answer 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-2265. 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.6. In nature, in a stable state hydrogen has two kinds of isotopes, namely 99.985% 1H with an atomic mass of 1.00783 sma and 0.015% 2H with an atomic mass of 2.01410 sma. The average atomic mass of hydrogen is .... (in sma) a. 1.00150 b. 1.00324 c. 1.00798 d. 1.01528 e. 1.07960 Note : all H have the number 1 below 1H
- 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.Needs Complete solution. Plz.What is the nuclear equation for Th (beta decay)? (Just enter a, b, c or d without a period). 90 235 a. 334TH 90 b. 234 Th 234 Ac + e 90 89 4 Pa + °1e 234 c. 30 Th d. 84TH - 1 Pa + °e 90 O a O b O c « Previous MacBook Pro
- 5. A sample of protactinium -234 of mass 100 g has a half-life of G-7 hours. A. what praction of the sample has not decayed after 20-1 hours? B. What is the mass of undecayed protactinium -234 after this period of time...3. (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