. . . . . . . . . . . . . . . . . . . "http://www.iso.org/iso/catalogue_detail?csnumber=31895"^^ . . . . . . . . . . . . "B" . . . . . . "Mass Defect"@en . . "The \"Mass Defect\", also termed mass deficit, or mass packing fraction, describes mass change (decrease) in bound systems, particularly atomic nuclei." . . . "\\(B = Zm(^{1}\\textrm{H}) + Nm_n - m_a\\), where \\(Z\\) is the proton number of the atom, \\(m(^{1}\\textrm{H})\\) is atomic mass of \\(^{1}\\textrm{H}\\), \\(N\\) is the neutron number, \\(m_n\\) is the rest mass of the neutron, and \\(m_a\\) is the rest mass of the atom."^^ . . . . . . . . . . . . "http://en.wikipedia.org/wiki/Binding_energy"^^ . .