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The Half-Life of the Radium Isotope Ra-226 Is Approximately 1,599

Question 84

Multiple Choice

The half-life of the radium isotope Ra-226 is approximately 1,599 years. What percent of a given amount remains after 200 years? Round your answer to two decimal places. ​


A) 91.70 %
B) 5.92 %
C) 93.70 %
D) 6.25 %
E) 0.92 %

Correct Answer:

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