The modern atomic mass unit if based on the mass of ………
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C-12 isotope
Carbon-12 isotope. According to modern atomic mass unit, one atomic mass unit (amu) is defined as one-twelfth of mass of an atom of `C-12` isotope, i.e. 1 amu `(u) = (1)/(12) xx "weight of an atom of C-12 isotope"`.
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