English Explanatory Dictionary

relative atomic mass

English dictionary entry

Meanings

noun
  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.

Word forms

relative atomic mass

Synonyms

atomic weight
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