Question

Half life period of a radioactive substance is 20 days .After 30 days what percentage of the substance will be left?

This is the questions of class 12 Chemistry - Kinetics
Please answer using the chemistry formula

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Answer 1

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The answer is 25%

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Answer 2

Here it is

Half life period of a radioactive substance is 20 days .After 30 days what percentage of the substance will be left because of the features of lunatic energy....

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