The isotope ""^(235)U decays by alpha em...

The isotope `""^(235)U` decays by alpha emission with a half life of `7.0xx10^(8)y`. It also decays (rarely) by spontaneous fission, and if the alpha decay did not occur, its half life due to spontaneous fission alone would be `3.0xx10^(17)`y. (a) At what rate do spontaneous fission decays occurs in 1.0 g of `""^(235)U`? (b) How many `""^(235)U` alpha decay events are there for every spontaneous fission event?

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The correct Answer is:

a. 16 fissions per day b. `4.3xx10^(8)`

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