Chromium-55 (54.940 8 u)emits an electron leaving a daughter nucleus of manganese-55 (54.938 0 u).How much energy is released in this reaction? (1 u = 931.5 MeV/c²) A)5.59 MeV B)2.61 MeV C)1.40 MeV D)0.70 MeV

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Quizplus · Accepted Answer

The energy released is calculated using the mass difference between the parent and daughter nuclei. The mass difference is 54.9408 u - 54.9380 u = 0.0028 u. Converting this mass difference to energy using 1 u = 931.5 MeV/c² gives 0.0028 u * 931.5 MeV/u = 2.61 MeV.