SOLUTION: This is a homework assignment not in the book. Ra226 has a half-life of1600 years. How many grams of Ra226 will be present after 2000 years if there are 20g present initially?

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Question 112901: This is a homework assignment not in the book. Ra226 has a half-life of1600 years. How many grams of Ra226 will be present after 2000 years if there are 20g present initially?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the formula you need is x=a((1/2)^(t/h))

where x=amount remaining; a=initial amount; t=time; h=half-life

x=20((1/2)^(1.25))