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CBSE - IX - Chemistry

define unified mass.

Asked by G.Karthik 24th August 2008, 7:44 PM
Answered by Expert


The unified atomic mass unit (u), or dalton (Da) or, sometimes, universal mass unit, is a unit of mass used to express atomic and molecular masses. It is the approximate mass of a hydrogen atom, a proton, or a neutron.

Answered by Expert 25th August 2008, 8:20 AM

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