Now ma where m is the m, the atomic mas, and Zm, +Zm,-Zm, + m)- 49 MeVle of a hy
ID: 2030707 • Letter: N
Question
Now ma where m is the m, the atomic mas, and Zm, +Zm,-Zm, + m)- 49 MeVle of a hydrogen atom. Finally, we use the conversion to write c931.49 MeV/u. The binding energy is then 931.49 MeV/c B (ZrnH + Nnh" m,seen)% (931.49 MeV/u) (42.6) (binding energy) EXAMPLE 42.1 The binding energy of i What is the binding energy of the SOLVE The isotope spe has Z-26 and N-30. The atomic mass of S Fe, found in Appendix C, is 55.9349 u. Thus the mass differ- ence between the Fe nucleus and its constituents is s units ron "Fe nucleus? 26 and N- 30. The atomic mass Thus the binding energy of where, from Table 42.2, 1.0078 u is the mass of the hydrogen atom. Thus the "Fe is m-26(1.0078u)+30(1.0087 u)-55.9349 u 0529 ulent of more than hal B- (0.529 u) x(931.49 MeV/u) -493 Mev ASSESS The binding energy is extremely large, the energy equiva- the mass of a proton or a neutron. The nuclear bi nuclear bonds. A more useful nding energy increases as A increases simply because there are moreExplanation / Answer
Comparison of electron mass with proton and neutron is much less . Hence we neglect the mass of electron during calculation for mass defect.
Hence first option is correct.
No need. The electrons masses are negligible compared to the masses of the protons and neutrons.
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