Chemistry, asked by anchitha5398, 1 year ago

Why do we define unified mass unit with respect to carbon?

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Answered by choudhary21
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Hello dear................


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The unified atomic mass unit or dalton (symbol: u, or Da) is a standard unit of mass that ... It is defined as one twelfth of the mass of an unbound neutral atom of .... This can be expressed mathematically as.


The unified atomic mass unit or dalton (symbol: u, or Da) is a standard unit of mass that quantifies mass on an atomic or molecular scale (atomic mass).

One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol.

It is defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest, and has a value of 1.660539040(20)×10−27 kg, or approximately 1.66 yoctograms.[3] The CIPM has categorised it as a non-SI unit accepted for use with the SI, and whose value in SI units must be obtained experimentally.
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