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An Isotope of Thorium 227Th{ } ^ { 227 } \mathrm { Th }

Question 220

Short Answer

An isotope of thorium, 227Th{ } ^ { 227 } \mathrm { Th } , has a half-life of 18.4 days. How long will it take for 77% of the sample to decompose?
Please round the answer to the nearest tenth.

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