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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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Conny Young Conny Young
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3 years ago
A radioactive sample has an initial activity of 2.00 × 106 cpm (counts per minute), and after 4.0 days, its activity is 9.0 × 105 cpm. What is its activity after 31 days?


▸ 8.3 cpm

▸ 4.1 × 103 cpm

▸ 4.9 × 102 cpm

▸ 1.0 × 10–9 cpm

▸ None of these are correct.
Textbook 
Chemistry: An Atoms First Approach

Chemistry: An Atoms First Approach


Edition: 3rd
Authors:
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mh.halimimh.halimi
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3 years ago
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Conny Young Author
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3 years ago
Good timing, thanks!
Goku935
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Yesterday
You make an excellent tutor!
IvanaVR
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2 hours ago
Smart ... Thanks!
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