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Question
The half-life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 days if you start with 2.0 mg of the isotope?
N = No * (1/2)^(415.2/138.4)
N = 2 * (1/2)^(3)
N = 2(.125)
N = .25mg
N = 2.5 * 10^-1
I am not certain, since it has been awhile since i have done these types of problems, i am just going by what the site www.studyphysics.ca/30/Unit4/Radioactive/Halflife/note.htm
Shows me.
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| Rating(1-10) | Knowledgeability = 10 | Clarity of Response = 10 | Politeness = 10 |
| Comment | Thank you!!!!! I totaly had that one figured out wrong...... I see what you mean thru your example. | ||
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Sherman D.
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