How Do You Calculate the Mass Defect of O-15?

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SUMMARY

The mass defect of O-15 is calculated using the formula D = (8Mp + 7Mn - M), where Mp is the proton mass (938.3 MeV/c²), Mn is the neutron mass (939.6 MeV/c²), and M is the mass of O-15 (13,975 MeV/c²). The calculation yields a mass defect of 108.6 MeV/c². It is important to consider the mass of electrons in this calculation, as they contribute to the total mass unless specified otherwise.

PREREQUISITES
  • Understanding of nuclear physics concepts
  • Familiarity with mass-energy equivalence (E=mc²)
  • Knowledge of atomic structure, specifically protons and neutrons
  • Basic proficiency in performing unit conversions in MeV/c²
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  • Research the role of electron mass in atomic mass calculations
  • Learn about nuclear binding energy and its relation to mass defect
  • Explore advanced nuclear physics topics, such as isotopes and their stability
  • Study the implications of mass defect in nuclear reactions and fission
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Homework Statement



Find the mass defect of O-15.

2. The attempt at a solution

I've see a couple different suggested ways for computing the mass defect and I want to know if I'm doing this correctly.

Mass of O-15 = 13,975 MeV/c^2
Proton mass = 938.3 MeV/c^2
Neutron mass = 939.6 MeV/c^2

D = (8Mp + 7Mn - M) = (8(938.3) + 7(939.6) - (13,975)) = 108.6 MeV/c^2
 
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You probably need to add 8 electron masses also, it means something at this scale unless the Mass of O-15 is without electrons.
 

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