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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?
a) 0.125 g
b) 0.50 g
c) 0.0625 g
d) 0.25 g
Answers: 2
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The half-life of radium-226 is 1620 years. how much of one gram of radium-226 will remain unchanged...
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