57. (a) Since the positron has the same mass as an electron, and the neutrino has negligible mass, then ∆mcmce22=+−mmBCbg. Now, since Carbon has 6 electrons (see Appendix F and/or G) and Boron has 5 electrons, we can add and subtract 6meto the above expression and obtain ∆mm cmmeee2762=+−−=+−BCdiWe note that our final expression for ∆mc2involves the atomicmasses, as well an “extra”
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