Dalton (unit)
unit of mass defined as ¹⁄₁₂ of the mass of a carbon-12 atom From Wikipedia, the free encyclopedia
The dalton or unified atomic mass unit, abbreviated as u, amu or Da) is a unit of measurement for measuring the mass of atoms, equalling ¹⁄₁₂ of the mass of the carbon-12 isotope, the most abundant form of carbon atoms in nature.[1]
History
The unit is named after English chemist and physicst John Dalton (1766 – 1844). 1 atomic mass unit is approximately 1.66 × 10-27 kg, or 1.66 × 10-24 g.[2]
Atomic physics
In atomic physics, 1 amu can be expressed as roughly 931 MeV (M = 106, 1 eV ≈ 1.60 × 10-19 J) due to mass-energy equivalence, illustrated by ΔE = Δmc2.[3][4]
Related pages
References
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