View the step-by-step solution to:


It was your turn to straighten up the lab, but, oh great, someone spilled a solution on the floor for you to

clean up and apparently left without saying a word. Upon a closer look, you notice an overturned bottle, empty, from which the mixture drained, and it has a radiation symbol on it. Further, the solution smeared the isotope name, so do not know what it is. The chart records show that the following isotopes were kept in the lab: 22Na, 54Mn, 57Co, 60Co, 88Y, 89Sr, 133Ba, 137Cs, 141Ce, 168Tm, and 241Am. You have only a Geiger-Muller counter at hand. At first count, the emissions are below 1 mR/hr, so you are not in immediate danger. Next, you take the following 1-minute counts spaced at 48 hours apart. i. Which isotope do you suspect was in the bottle? ii. How sure are you? Explain your reasoning. Measurement number Counts 1 8754 2 8517

Recently Asked Questions

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.


Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question