define what is atomic mass and its SI unit
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an atomic mass unit aur AMU is a physical constant equal to twelfth of the mass of unbound atom of carbon 12 it is SI unit of mass .........
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The mass of atom of a chemical element is expressed in atomic mass unit (a.m.u)
1a.m.u=1.66×10^-27kg(Very important you will need this value in many numericals)
The definition is from class 9 and class s 10 coincise physics.
The SI unit Is Da or u
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