Answer
$0.01$
Work Step by Step
Recall that $\frac{R_{226}}{R_{210}} = 1.00 $
Since only $1% $ of the $^{226}Ra$ remains,
So $1% $ of $1.00$ is $0.0100$
The ratio is $(0.01)(1.00) = 0.01$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 42 - Nuclear Physics - Problems - Page 1308: 96d
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