what is atomic mass unit
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a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12
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ATOMIC MASS UNIT :-
The atomic mass unit (amu) is equal to one twelfth (1/12) of the mass of one atom of carbon-12 isotope.
= 1 amu = 1/12×mass of one C-12 atom.
≈mass of one nucleon in C-12 atom.
= 1.66 × 10^-24gm or 1.66×10^-27kg.
ONE AMU IS ALSO CALLED ONE DALTON (Da). NOW-A-DAYS, AMU HAS BEEN REPLACED BY "u" WHICH IS KNOWN AS UNIFIED MASS.
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