VSR-0112
QUESTION
Half-life of Cs-137 is?
OPTIONS
(A) 5 days
(B) 30 days
(C) 30 years
(D) 5 years
ANSWER
(C) 30 years
EXPLANATION
Cesium-137 has a physical half-life of about 30 years, making the 30-year choice appropriate. Five or thirty days and five years are far shorter than this isotope's actual radioactive decay interval.
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Veterinary Surgery and Radiology · 200 Questions
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