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Question
If half life of a radioactive element is 3 hours after 27 hours it activity becomes ______.
Options
`1/32`
`1/512`
`1/8`
`1/264`
MCQ
Fill in the Blanks
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Solution
If half life of a radioactive element is 3 hours after 27 hours it activity becomes `underline(1/512)`.
Explanation:
A = `"A"_0 [1/2]^("t"/("T_(1/2)))`
`"A"/"A"_0 = [1/2]^(27/3) = [1/2]^9 = 1/512`
`"A"/"A"_0 = 1/512`
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Radioactive Decay Law
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