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How much of one gram of radium -226 will remain unchanged after four half lives?
Wiki User
∙ 11y ago
1g (1/2)4
= 1/16 g
Wiki User
∙ 11y ago
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The half-life of radium-226 is 1620 years. How much of one gram of radium-226 will remain unchanged after four half-lives?
After 4 half-lives, the amount remaining is ( (1/2)^4 ), which equals 1/16. Therefore, 1 gram of radium-226 will have 1/16 gram unchanged after four half-lives, which is 0.0625 grams.
How much of one gram of radium-226 will remain unchanged after four half-lives?
After each half-life, half of the radium-226 will decay. Therefore, after four half-lives, 1/2^4 or 1/16th of the original gram of radium-226 will remain unchanged. This means that 1/16th of a gram, or 0.0625 grams, will still be unchanged after four half-lives.
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How many milligrams of a 15.0 mg sample of radium-226 remain after 6396 years if the half-life of radium-226 is 1599?
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