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

question 37

Multiple Choice

The half-life of the radium isotope Ra-226 is approximately 1,599 years.What percent of a given amount remains after 800 years? Round your answer to two decimal places.

• A)70.70 %
• B)5.71 %
• C)72.70 %
• D)25.02 %
• E)0.71 %

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