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Radium-226 is a metal with a half-life of 1600 years. If you start with 1 kilogram of radium-226, how much will remain after 20,000 years?
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Jul 22, 2018
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Radium-226 is a metal with a half-life of 1600 years. If you start with 1 kilogram of radium-226, how much will remain after 20,000 years?
Mathematics
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Lasse Espeholt
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Lasse Espeholt
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Ending Amount = Beginning Amount / 2^n
where 'n' = # of half lives
n = 20,000 / 1,600 = 12.5 half-lives
Ending Amount = 1 kg / 2^12.5
Ending Amount = 1 kg /
5,792.6
Ending Amount =
0.00017263 kilograms =
0.17263 grams
Mdd
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Jul 27, 2018
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Mdd
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