????????

???????? ( m _a) ( ?????? : Atomic mass) ??????????????????????????????????????????????????????????? ???? ?? ? ??????????? ????????????? ???????????? (unified Atomic Mass Unit - UAMU) ??????? "u" ??? 1 u ???????????? 1/12 ?????????????????????????????????-12 ^[1] ???? 1.66 x 10 ^-24 ???? ??????????????????????? 1 ???????????????? ???? 1/16 ??? 1 ???????????????? ????????????????? ??????????????????????????????????????????????????? ??????????????????????? u ?????????????????????? ?????? ^[2]

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↑ IUPAC , Compendium of Chemical Terminology , 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006-) " atomic mass ".
↑ Table of Isotopic Masses and Natural Abundances, https://www.ncsu.edu/ncsu/pams/chem/msf/pdf/IsotopicMass_NaturalAbundance.pdf

?????? ??????????? ?????????? ???? ???????????????????????????????? ???????????????

[1] IUPAC , Compendium of Chemical Terminology , 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006-) " atomic mass ".

[2] Table of Isotopic Masses and Natural Abundances, https://www.ncsu.edu/ncsu/pams/chem/msf/pdf/IsotopicMass_NaturalAbundance.pdf

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