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he half-life of radioactive Bk-248 is 23.7 h.   How long does it tak

he half-life of radioactive Bk-248 is 23.7 h.   How long does it tak

Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter24: Nuclear Chemistry
Section: Chapter Questions
Problem 86A
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The half-life of radioactive Bk-248 is 23.7 h.   How long does it take for 33% of the sample to decay?

Expert Solution
Step 1 introduction

 

  • Radioactive decay follows the first order kinetics 
  • its decay constant

  λ = 2.303t log NoNwhere λ = decay constant = 0.693t1/2 t = tim e taken = ?No  = initial atoms = 100N = 100-33 = 67

 

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