what is atomic mass
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the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
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The atomic mass is the mass of the atomic in relation with 1/12 of mass of a carbon atom.
The atomic mass is measured in ATOMIC MASS UNIT (AMU) or DALTON (D)
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