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  1. › wiki › Atomic_massAtomic mass - Wikipedia

    The atomic mass (m a or m) is the mass of an atom.Although the SI unit of mass is the kilogram (symbol: kg), atomic mass is often expressed in the non-SI unit dalton (symbol: Da) – equivalently, unified atomic mass unit (u). 1 Da is defined as 1 ⁄ 12 of the mass of a free carbon-12 atom at rest in its ground state.

  2. Mass transfer is the net movement of mass from one location (usually meaning stream, phase, fraction or component) to another. Mass transfer occurs in many processes, such as absorption, evaporation, drying, precipitation, membrane filtration, and distillation. Mass transfer is used by different scientific disciplines for different processes ...

  3. The word relative in relative atomic mass refers to this scaling relative to carbon-12. Relative atomic mass values are ratios;:1 relative atomic mass is a dimensionless quantity. Relative atomic mass is the same as atomic weight, which is the older term. The number of protons an atom has determines what element it is.

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