define atomic mass and atomic mass unit
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atomic mass is the mass of atom which is equivalent to number of electron and proton
unit is 1du
unit is 1du
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The dalton or unified atomic mass unit is a unit of mass widely used in physics and chemistry. It is defined precisely as 1/12 of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest.
the mass of an atom of a chemical element expressed in atomic mass units.
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