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- The nuclear radius of a fictitious element is 3.145 fm. The number of protons and the number of neutrons in this nucleus are (select all that apply): 09 and 9 O8 and 10 O9 and 8 O8 and 8 9 and 10 O 10 and 8 O8 and 9 O 10 and 9b) Complete the following decay reaction by identifying both the temporary nucleus (??) and the end product (?) that it decays into. In this case, sodium-23 is bombarded with protons, forming a short-lived nucleus which quickly undergoes alpha decay. 2Na+H → (??) → (⁄?) + ª Enter the chemical symbol for the temporary nucleus: Enter the mass number for the end product, A = Enter the atomic number for the end product, Z = Enter the chemical symbol for the end product: AV A/ AV 10The stable nuclei 36Ar and 76Se both differ by 20 in atomic number from 56Fe, which lies at the peak of the binding energy per nucleon curve. Find B/A for both 36Ar and 76Se. Which one has the larger B/A? Why is this to be expected?
- An unknown element X has the following isotopes: ⁶⁴X (49.00% abundant), ⁶⁶X (28.00% abundant), ⁶⁸X (23.00% abundant). What is the average atomic mass in amu of X?Compute the approximate nuclear radius of: (₂) (c) Palladium-46Compute the approximate nuclear radius of: U (ن) (d) Nit -12 I allatiun c Actinium-89
- 4) What will be the decay constant for radon with a half-life of 3.82 days?2. The decay constant, Ai, for the a transition of 243 Am95 () to the various levels of 239NP93 may be estimated from In 1= 48.4 + 2.97 R½ Z¼ - 3.97 Z/T« - 660 o = 0.002la(la+1) where Z is the atomic number of the daughter nucleus, R is the radius of the daughter nucleus in femtometers and approximated by R=1.2XA3, Ta is the kinetic energy of the a - particle in MeV and la is the angular momentum carried by the a- particle. a. Calculate the branching ratio of the 3 transitions. b. Estimate the mean lifetime of the 243Amº5 5- c. The transition from the 239N%93 () to the state proceeds either directly by gamma emission or by gamma emission to the state first or by internal conversion of K-electron, with a conversion coefficient of 2. Use Weisskopf estimates to calculate the lifetime of the 9- excited state.