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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The dalton or unified atomic mass unit (SI symbols: Da or u) 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. A mass of 1 Da is also referred to as the atomic mass constant and denoted by mᵤ.
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