Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8270 decays per minute to 3160 decays per minute over a period of 4.50 days. Review I Constants I Periodic Table Part A What is the half-life T₁/2 of this isotope? Express your answer numerically, in days, to three significant figures. ► View Available Hint(s) ΑΣΦ ? T1/2 days
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- Part A Compute the energy released in the fission reaction n+ 239 Pu → 137 Xe+ 100 Zr + 3n Atomic mass of 137 Xe is 136.911562 u, atomic mass of 100 Zr is 99.91776 u, and atomic mass of 239 Pu is 239.052157 u. Express your answer in megaelectron volts. ΔΕ MeV Submit Request Answeri need the answer quicklyPart A Calculate the total binding energy, and the binding energy per nucleon, for Li. The masses of the atoms of Li and H are 7.016004 u and 1.007825 u, respectively. The mass of a neutron is 1.008665 u. Express your answers using four significant figures separated by a comma. Etotal, Eper nucleon = MeV
- Question 2 pleaseThe barium isotope 131 Ba has a half-life of 12 days. A 210 µg sample of 131 Ba is prepared. Part A What is the mass of 131 Ba after 1 day? Express your answer to two significant figures and include the appropriate units. μΑ ? Value mug m =Part A Calculate the mass of a "Li nucleus. Give all answers in SI units. Express your answer to four significant figures and include the appropriate units. ► View Available Hint(s) μA m = 11.7174 10 Submit - 27 Previous Answers kg ? X Incorrect; Try Again; 4 attempts remaining
- [Review Topics] [References] Radioactive vanadium-48 decays with a half-life of 16.0 days. a. What is the value of k in s12 k = b. A sample contains 58.0 mg 48 t° V. How many decay events will be produced in the first second? Assume the atomic mass of 48 V is 48.0 u. decays/s c. A chemist obtains a fresh sample of 8V and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25% of the initial measured value. How long does she have to do the experiment? days Submit Answer Retry Entire Group 4 more group attempts remainingNuclear Physics Item 12Part 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 II
- HELP ASAP!!!! #6 onlyA radioactive sample has a half-life of 1.0 min. That is, each nucleus has a 50% of undergoing a decay sometime between t = 0 and t = 1 min. One particular nucleus has not decayed at t = 15 min. Part A What is the probability that this nucleus will decay sometime between t = 15 min and t = 16 min? Express your answer using two significant figures. ΤΟ ΑΣΦ ? %topic: nuclear fusion and fission Answer the following problem and show complete solutions. view image.