A 1 Ci source of radiation is a significant source. 238 U is an alpha emitter. What mass of 238 U has an activity of 1 Ci?
the mass of uranium is 2.96x103kg
Number of atom is,
Here R0 is initial and r is final decay rate
Convert Ci to Bq
And final decay rate is calculated
Substitute 4.47x109 year for t1/2 from Appendix C in above final rate equation
Then the number of atom is calculated as follows
Substitute 3.7x1010 decay/sec for R0 and 4.92x10-18 decays for r in above eqution
Hence the mass of uranium is 2.96x103kg
Use data in Appendix to make your own chart of stable and unstable nuclei, similar to Figure , for all nuclei with .Use a blue or black dot to represent stable isotopes, a red dot to represent isotopes that undergo beta-minus decay, and a green dot to represent isotopes that undergo beta-plus decay or electron-capture decay.
94% of StudySmarter users get better grades.Sign up for free