document.write( "Question 1030480: 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 155 grams of a radioactive isotope, how much will be left after 3 half-life's?
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\n" ); document.write( "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.
\n" ); document.write( "Starting with 155 grams of a radioactive isotope, how much will be left after 3 half-life's?
\n" ); document.write( "Round to the nearest gram.
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document.write( "It will be    after the first  half-life,\r\n" );
document.write( "              after the second half-life,  and\r\n" );
document.write( "              after the third  half-life.\r\n" );
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