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Which sample contains greater number of nuclei ?
a `5.00 -mu Ci` sample of `.^240 Pu` (half-life `6560 y`)
or `a 4.45-mu Ci` sample of `.^243 Am` (half-life `7370 y`).
A. `._(240)Pu`
B. `._(243)Am`
C. Equal in both
D. None of these

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