a 7/3Li has a binding energy of -39.244603 MeV. The mass of a hydrogen atom is 1.007825 u and the mass of a neutron is 1.008665 u
1) What is the mass defect for this isotope?
2) what is the mass of this isotope?
1) What is the mass defect for this isotope?
2) what is the mass of this isotope?
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You don't say what units you want the answers to be in. I'll assume 'u'.
1) Mass defect = -Binding energy/c^2 (based on E=mc^2)
1u = 931.46 MeV/c2 (standard conversion factor)
Mass defect = 39.244603 / 931.46 = 0.042132 u
2) 7Li/3 could be constructed from 3 H-atoms + 4 neutrons
Mass = mass of components - mass defect
= 3x1.007825 + 4x1.008665 - 0.042132
= 7.016003 u
1) Mass defect = -Binding energy/c^2 (based on E=mc^2)
1u = 931.46 MeV/c2 (standard conversion factor)
Mass defect = 39.244603 / 931.46 = 0.042132 u
2) 7Li/3 could be constructed from 3 H-atoms + 4 neutrons
Mass = mass of components - mass defect
= 3x1.007825 + 4x1.008665 - 0.042132
= 7.016003 u