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

Question 18

Multiple Choice

The half-life of the radium isotope Ra-226 is approximately 1,599 years. If the initial quantity of the isotope is 38 g, what is the amount left after 1,000 years? Round your answer to two decimal places.


A) 24.63 g
B) 30.60 g
C) 25.13 g
D) 11.88 g
E) 12.32 g

Correct Answer:

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