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Constants - Atomic Mass Unit

Symbol: amu
mu
u
Value: 1.66053873(13) × 10-27 kg
931.494013(37) MeV
1.49241778(12) × 10-10 J
Category: Physico-Chemical Constants - Physico-Chemical Constants
Description: The atomic mass unit (or dalton) is defined as one twelfth of the mass of the most abundant isotope of carbon - 12C.
 
Prior to 1960, the atomic mass unit was defined in terms of the mass of a 16O isotope - 1 amu = 1.6599 x 10-27 kg.

 
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