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Dalton

The unified atomic mass unit (symbol: $\mu$) or dalton (symbol: Da) is a unit that is used for indicating mass on an atomic or molecular scale. It is defined as one twelfth of the rest mass of an unbound atom of carbon-12 in its nuclear and electronic ground state, and has a value of $1.660538782(83) \times 10^{-27} kg$. One $Da$ is approximately equal to the mass of one proton or one neutron. The CIPM have categorised it as a "non-SI unit whose values in SI units must be obtained experimentally".

0.00000000000000000000000000166053878283

1.66053878283E-27

http://dbpedia.org/resource/Dalton

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http://en.wikipedia.org/wiki/Atomic_mass_unit

http://en.wikipedia.org/wiki/Dalton?oldid=495038954

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atomic-mass-unit