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RDF Terms

Relative Mass Excess

Applicable units are those of quantitykind:RelativeMassExcess

The "Relative Mass Excess" is the mass excess between the monoisotopic mass of an element and the mass of its A + 1 or its A + 2 isotopic cluster (extrapolated from relative mass defect).

http://en.wikipedia.org/wiki/Mass_excess

http://www.iso.org/iso/catalogue_detail?csnumber=31895

$\Delta_r = \frac{\Delta}{m_u}$, where $\Delta$ is the mass excess and $m_u$ is the unified atomic mass constant.

$\Delta_r$

The "Relative Mass Excess" is the mass excess between the monoisotopic mass of an element and the mass of its A + 1 or its A + 2 isotopic cluster (extrapolated from relative mass defect).