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Strontium- 90 Is a Byproduct in Nuclear Reactors Fueled by the Radioisotope

Question 121

Multiple Choice

Strontium- 90 is a byproduct in nuclear reactors fueled by the radioisotope uranium- 235. The half- life of strontium- 90 is 28.8 yr. What percentage of a strontium- 90 sample remains after 75.0 yr?


A) 16.5
B) 68.1
C) 38.4
D) 2.60
E) 7.40

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