Question
Asked Jan 7, 2020
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 A radioactive sample contains 1.55 g of an isotope with a half-life of 3.8 days. What mass of the isotope remains after 5.5 days? (Assume no excretion of the nuclide from the body.) 

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Expert Answer

Step 1

The process in which energy is lost by unstable atomic nucleus via radiation is known as radioactive decay. The element containing unstable atomic nucleus is known as radioactive element.

Step 2

Given data:

Chemistry homework question answer, step 2, image 1
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Step 3

Radioactive decay is the first-order reaction. The rate constant (k) fo...

Chemistry homework question answer, step 3, image 1
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