Question

define atomic mass define
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Answer 1

Answer:

The mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom the mass number or to the average number allowing for the relative abundance of different isotopes.

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Answer 2

Answer:

A unit of mass used to express atomic and molecular weight, equal to the one twelfth of mass the atom of carbon 12

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