Mathematics, 09.12.2021 19:50 okaiikk
This exercise uses the radioactive decay model. Radium-221 has a half-life of 30 sec. How long will it take for 78% of a sample to decay? (Round your answer to the nearest whole number.)
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This exercise uses the radioactive decay model.
Radium-221 has a half-life of 30 sec. How long wil...
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