Question

what is atomic mass unit (amu)?

Answer 1

hey,
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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Answer 2

I have a simple definition and explanation!
The unit of relative atomic masses is called atomic mass unit.
the atomic mass unit is 1/12 the mass of one atom of carbon-12th.
when this atomic mass unit is expressed in grams, it is: 1amu = 1.66 multipy by 10 Ray's to power -24g.