http://www.flashcardexchange.com/tag/halflife www.flashcardexchange.com: halflife Flashcards en-us Thu, 16 Feb 2012 04:15:15 PST Thu, 16 Feb 2012 04:15:15 PST support@flashcardexchange.com 720 http://www.flashcardexchange.com/flashcards/view/823786 Cards on nuclear chemistry topics: includes radiation types & half life. 2009-06-06 http://www.flashcardexchange.com/flashcards/view/823786