science
posted by Brenda .
the half life of tritium is 12.5 years. How much of a 1 g sample will remain after 25 years

See if any of the following links will help:
http://search.yahoo.com/search?fr=mcafee&p=the+half+life+of+tritium+is+12.5+years.+How+much+of+a+1+g+sample+will+remain+after+25+years+
Sra