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Relative atomic mass

noun

Definitions

Noun
  1. 1
    The ratio of the average mass per atom of the naturally occurring form of an element to 1/12 of the mass of a carbon-12 atom. Symbol Aᵣ; abbreviation RAM or r.a.m. For elements with several isotopes, the most stable isotope is treated as the representative.
  2. 2
    (chemistry) the mass of an atom of a chemical element expressed in atomic mass units wordnet

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