́ ́ ́ ( . . .), ́, , , , . 12C 1/12 .
1960 1961 . atomic mass unit (a.m.u.) unified atomic mass unit (u.a.m.u.) ( , ).
1997 2- . . .:
1 . . . ≈ 1,660 540 2(10)·1027 = 1,660 540 2(10)·1024
1 . . ., , , 1/NA, -1. , , , . . .
- 1 . . . ≈ 0,931 494 028(23) /c²;
- 1 /c² ≈ 1,073 544 188(27) . . .
. . . 2006 :
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1803 , ( ). 1818 , , 103. 1860- , . 1906 , 1/16 . (16O, 17O, 18O) : , 1/16 , , 1/16 16O. , 1961 , .
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- CERN Glossary: «Electronvolt (eV): A unit of energy or mass used in particle physics». (.)
- Atomic mass unit-electron volt relationship (.)
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