relative atomic mass


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relative atomic mass

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.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

relative atomic mass

[′rel·əd·iv ə′täm·ik ′mas]
(chemistry)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Since the mass of an argon atom is 10/3 times that of [sup.12]C; the relative atomic mass would be 20 amu, (Relative mass of Argon atom=6 amu x 10/3=20 amu).
For the past 40 years, NBS/NIST has excelled in isotopic composition measurements which, with the highly accurately known isotope mass values, lead to the mean relative atomic mass values of polynuclidic elements in their characteristic terrestrial compositions.
The relative atomic masses are now the second data set that can be described by the bipolar model of oscillations in a chain system.

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