document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1030584>Question 1030584</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 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 <BR>\n" );
document.write( "200 grams of a radioactive isotope, how much will be left after <BR>\n" );
document.write( "5 half-lives?<BR>\n" );
document.write( "Use the calculator provided and round your answer to the nearest gram. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #645431 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=645431\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi there,<BR>\n" );
document.write( "The half-life of a radioactive isotope is <BR>\n" );
document.write( "the time it takes for a quantity of the <BR>\n" );
document.write( "isotope to be reduced to half its initial Activity. <BR>\n" );
document.write( "200 gms  - 100 gms 1 half life<BR>\n" );
document.write( "100 gms  -  50 gms  2 half lives<BR>\n" );
document.write( "50 gms   - 25 gms  3 half lives<BR>\n" );
document.write( "25 gms   -  12.5 gms  4 half lives<BR>\n" );
document.write( "12.5 gms  - 6.25 gms  5 half lives<BR>\n" );
document.write( "= 6 gms.<BR>\n" );
document.write( "Hope this helps :-) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );