An atom of uranium-235 (atomic mass: m(235U) cays to thorium-231 (atomic mass: m(23 Th) = 231.03630 u) 39.8 235.04392 u) de- 92 via the 90 emission of an a particle (nuclear mass: m(;a) c = 2.998 x 108 m s-1. 4.00151 u). Use
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Please answer parts C, D and E. Thank you in advance!
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