Textbook Question
A selenium-75 source is producing 300 rem at a distance of 2.0 m?b. What is its intensity at 25 m?
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17. Radioactivity and Nuclear Chemistry
Measuring Radioactivity
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Which radioactive isotope is most commonly used to date ancient rocks in geological (radiometric) dating?
A
(phosphorus-32)
B
(carbon-14)
C
(iodine-131)
D
(uranium-238)
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