Week_6-Nuclear_Chemistry (1)

Annah Moore - # of protons= 38 - # of neutrons= 52 - Mass #: 38+52= 90 - Atomic #: # of protons= 38 - Element: Strontium (Sr) - Nuclide Symbol: 88 38 Sr 6. Write the nuclear equation for the gamma decay of fluorine-19. - 19 F → 19 F + γ 7. Write the nuclear equation for the positron emission of sodium-23. - 23 11 Na → o 1 e + 23 10 Ne 8. Suppose Potassium-41 undergoes electron capture. Write the nuclear equation that represents this process. - 41 19 K + o -1 e → 41 18 Ar Part 2: Half-life and medical imaging Technetium-99m is an important isotope used in medical imaging (the m stands for metastable). Each day healthcare professionals around the world use Technetium-99m in thousands of medical scans. This material has a very short half-life of about 6 hours and decays by gamma decay to Technetium-99. In this exercise, you will look at why half-life is an important concern and how it affects your health. 9. Technetium-99m has a half-life of 6 hours. Use this to answer the following questions: a. What percentage of Technituum-99m would remain in your body 24 hours after injection with this radioisotope? Assume that the initial percentage is 100%.  A = P (1/2) t/h  A=amount remaining, P=original amount, t=elapsed time, and h= half-life  let us assume the initial amount of technetium-99m is X.  A=X(1/2) 24/6 = X/16 (remaining amount)  (Remaining amount / initial amount) *100 → (X/16) / (X) *100 = (1/16) *100 = 6.25% of the initial amount 3

Annah Moore Grading Rubric: Activity Deliverable Points Part I Complete Nuclear Chemistry Simulation 10 Part II/III Complete questions based on the scenario  Purpose (1 point)  Observation (3 points)  Complete table (5 points)  Questions (10 points)  Reflection (6 points) 25 Total Complete all lab activities 35 6