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nursofia_jasmani
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8 minutes
The half-life of the nuclide radium-225 is 15 days. A pure sample of this nuclide has a mass of 16g. How long will it be before the mass of radium-225 in the sample is 2.0g?
nursofia_jasmani
24 minutes
Light questions
nursofia_jasmani
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