Question

what is meant by unified atomic mass?​

Answer 1

Answer:

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Unified mass (u) refers to atomic mass unit (abbreviated as amu). It is defined as 1/12 the mass of an atom of carbon-12. According to latest IUPAC guidelines, we use the symbol u instead of amu to represent masses of atoms.

Answer 2

Answer:

1/12 the mass of an atom of carbon-12.