Assertion: strontium 90's life | /r/HasAspect | 0.75 grams
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text: earth science what would be the chart to use for carbon 14 whcih has a half life of 5730 years and a piece of wood which originally has 12 grams pf radioactive isotope; If the half lives occurred and now has 0.75 grams left? asked by lan on November 29, 2012