Mass Defect
mass number ¹ isotope mass ¹ mass of separate nucleons!
example: carbon-12
isotope mass
12.00000 amu
mass number
12
mass of separate nucleons
12.095646 amu
6 p+ @ 1.007276 amu each
6 n @ 1.008665 amu each
mass defect: 0.095646 amu
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