🇬🇧 en fr 🇫🇷

relative atomic mass noun

  • (chemistry, physics) 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.
 masse atomique relative, poids atomique
Wiktionary Links