Assertion: proton's mass | /r/HasProperty | possible
Facets:
Source sentences:
text: The lower mass per nucleon of 56Fe is possible because 56Fe has 26/56 = 46.43% protons, while 62Ni has only 28/62 = 45.16% protons; and the larger fraction of lighter protons in 56Fe lowers its mean mass-per-nucleon ratio, despite having a slightly higher binding energy in a way that has no effect on its binding energy.