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A radioactive istope having a half-line of `3` day was received after 12 day. It was found that there were `3 g` the istope when packed was:

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A radioactive istope having a half-line of `3` day was received after 12 day. It was found that there were `3 g` the istope when packed was:
A. `12g`
B. `24g`
C. `36g`
D. `48g`
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Correct Answer - `(d)`
`n = (12)/(3) = 4`
`:. N_(0) = N xx 2^(n) = 3xx2^(4) = 48g`
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