Mass (mass Spectrometry) - Nominal Mass

The nominal mass of an ion or molecule is calculated using the integer mass (ignoring the mass defect) of the most abundant isotope of each element. This is the equivalent of summing the mass numbers of all constituent atoms. For example H = 1, C = 12, O = 16, etc. The nominal mass of H2O is 18, for example.

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Nominal Mass - See Also
... Francis William Aston Atomic mass unit Gram-molecular weight List of elements by atomic mass Nitrogen rule (mass spectrometry) ...

Famous quotes containing the words mass and/or nominal:

    The mass never comes up to the standard of its best member, but on the contrary degrades itself to a level with the lowest.
    Henry David Thoreau (1817–1862)

    Discourage litigation. Persuade your neighbors to compromise whenever you can. Point out to them how the nominal winner is often a real loser—in fees, expenses, and waste of time. As a peacemaker the lawyer has a superior opportunity of being a good man. There will still be business enough.
    Abraham Lincoln (1809–1865)