relative atomic mass


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relative atomic mass

n
(Chemistry) the ratio of the average mass per atom of the naturally occurring form of an element to one-twelfth the mass of an atom of carbon-12. Symbol: Ar Abbreviation: r.a.m. Former name: atomic weight
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relative atomic mass

(atomic weight) The mass (quantity of matter) of atoms.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.relative atomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass unitsrelative atomic 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
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References in periodicals archive ?
This CRM consists of a natural uranium metal bar having an assay purity of (99.975 [+ or -] 0.006) % by mass and a relative atomic mass of 238.028 918 [+ or -] 0.000 012, with certified values for atom percentages of [sup.234]U, [sup.235]U, and [sup.238]U isotopes (given in the second column of Table 1), (2) as obtained from mass spectrometry.
The constant refers to the number of atoms in a sample whose bulk mass in grams equals the relative atomic mass of the element.
Step 4: Relationship between molar mass and relative atomic mass was [sup.12]C Why is the number standing for molar mass in grams for any atom the same with the number standing for the relative mass in atomic mass units for a single atom?

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