Question

Asked Sep 25, 2019

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Step 1

To determine the amount of the radioactive isotope with starting amount 130 grams present after 4 half-lives.

Step 2

The half life of a substance is time after which the initial amount of the substance is reduced to half.

Step 3

Consider that the initial amount of the radioactive substance present is 130 grams.

After 1 half-life the amount of radioactive substance present = 130/2 = 65 grams

After 2 half-life the amount of radioactive substance pre...

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