ch42-p052 - 52. (a) The disintegration energy for...

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() ( )( ) 235 230 5 2 5 UT h H e 235.0439u 230.0331u 5.0122u 931.5MeV/u 1.30MeV. Qm m mc =− = Only the second decay process (the α decay) is spontaneous, as it releases energy. 52. (a) The disintegration energy for uranium-235 “decaying” into thorium-232 is 235 232 3 2 3 h H e 235.0439u 232.0381u 3.0160u 931.5MeV/u 9.50MeV. m = (b) Similarly, the disintegration energy for uranium-235 decaying into thorium-231 is
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