Chapter 21 Practice Questions
mg sample of cesium 137 to 8.7 mg? A)32 B)3.2 C)52 D)50 E)46 35) 36)The half-life for beta decay of strontium-90 is 28.8 years. A milk sample is found to contain 10.3 ppm strontium-90. How many years would pass before the strontium-90 concentration would ...
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