3.  Unfortunately Dr. K had to have surgery and in this surgery, a radioactive isotope was inserted into his body  We collected data using a geiger counter  This data told us how radioactive the isotope in Dr. K was  After gathering data in an Excel chart, we used it to try and determine the mystery isotope in Dr. K

4. In order to figure out the range of half-lives of the mystery isotope, I created a scatter plot in Excel. Then I input different half-lives to find the line of best fit according to the collected data.

5.  W-178  U-230  Es-253  As-74  Rb-86  Pd-103  Eu-147  Th-227  Pa-230  Th-234  Cf-253 I figured out that the half life of the isotope was somewhere between 15 and 25 days. These are the isotopes that fall under that category.

6.  Eu-147  Th-227  Pa-230  U-230  Cf-253  Es-253 The isotope does not emit an alpha particle… but these do.

7.  W-178  Rb-86  As-74  Pd-103  Th-234 But we can eliminate one more because the isotope in Dr. K has to be a metal in order to create small “seeds”.

8.  As-74 We can eliminate Arsenic because the isotope in Dr. K has to be a metal in order to create small “seeds” and Arsenic is not.

9.  Rb-86  W-178  Pd-103  Th-234 We can eliminate Rubidium, Tungsten, and Thorium because their daughter nuclei are unstable and would be harmful to Dr. K’s body.

10. Palladium-103  It has a half life of 16.99 which fits the half life needed  It is a metal so it can be used as small “seeds” needed for the surgery  Its daughter product is stable

11.  Radioisotope  Used in radiation therapy for prostate cancer and uveal melanoma  Can be created from palladium-102 or rhodium-103 using a cyclotron  Decays by electron capture to rhodium- 103 which is stable  Emits gamma rays with 21 keV of energy