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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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Ashurbanipal Ashurbanipal
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11 months ago
A sample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay.  If after 1.10 years the activity is 952 disintegrations per minute, what is the half-life of this radioisotope?

▸ 4.38 × 10–2 yr

▸ 11.4 yr

▸ 0.25 yr

▸ 15.8 yr

▸ 9.1 yr
Textbook 
Chemistry

Chemistry


Edition: 11th
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evgenomeevgenome
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11 months ago
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Ashurbanipal Author
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11 months ago
Thank you, thank you, thank you!
Marcie D
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Yesterday
Brilliant ツ
jaray75
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2 hours ago
Smart ... Thanks!
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