atomic mass

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Related to Atomic masses: relative atomic mass

atomic mass

n.
The mass of an atom, usually expressed in atomic mass units.

atomic mass

n
1. (Chemistry) the mass of an isotope of an element in atomic mass units
2. (Chemistry) short for relative atomic mass See atomic weight

atom′ic mass′


n.
the mass of an isotope of an element measured in units based on 1/12 the mass of the carbon-12 atom. Abbr.: at. m.

atomic mass

The mass of a given atom or molecule, expressed in atomic mass units. Compare atomic weight.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass unitsatomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass units
mass - the property of a body that causes it to have weight in a gravitational field
combining weight, eq, equivalent weight, equivalent - the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen
meq, milliequivalent - one-thousandth of an equivalent
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
Translations

atomic mass

n (Chem) → massa atomica
References in periodicals archive ?
Atomic masses that appear in some protein patterns include 74, 703 and 1665 which are all multiples of 37.
In this article we show that the relative atomic masses can be reproduced by almost the same the bipolar model.
It exists as four stable (non-radioactive) isotopes with atomic masses of 50, 52, 53 and 54.
Because absolute numbers of atoms of some isotopes are difficult to measure, and because ratios of isotopes with very similar atomic masses can be measured accurately and precisely with a mass spectrometer, equation (5) may be modified while preserving the equality of both sides of the equation by dividing each side by the identical amount of a stable non-radiogenic isotope (d) of the same element as the daughter isotope.
XXXX Average atomic masses </pre> <p>KEY DEFINITIONS:
Several of the tables have been expanded and updated, including: bond dissociation energies, NIST atomic transition probability tables, properties of semiconductors, atomic masses and abundances, threshold limits for airborne contaminants, and the standard transfomed Gibbs energy of formation for important biochemical species.
Because of the deviation of atomic masses from the integral value (except carbon 12), different elemental compositions that have the same nominal mass differ slightly in actual mass.
Kibble, A measurement of the gyromagenetic ratio of the proton by the strong field method, in Atomic Masses and Fundamental Constants 5, J.
02 as the earlier versions have some errors in the atomic masses.
Researchers have now measured the atomic masses of various isotopes with sufficiently high accuracy to permit direct, high-precision comparisons of mass differences with gamma-ray energies in nuclear processes.