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Question

The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 210 grams of a radioactive isotope, how much will be left after half-lives?Use the calculator provided and round your answer to the nearest gram.

Answer 1

In one half life there will be 1/2 left or 210 x .5= 105 grams

after the next half life. 1/2 of the remaining amount will be left or 105 x .5 = 62.5 grams

after the next or third half life you will again have 1/2 left or .5 x 62.5= 31.25 grams

this pattern repeats for,each additional half life