Question

atomic mass number is a whole mass number​

Answer 1

Answer:

Atomic mass is never an integer number for several reasons b the atomic mass reported on a periodic table is the weighted average of all the naturally occurring isotopes. Being an average it would be most unlikely to be a whole number . The mass of an individual atom in atomic mass units is the mass relative to carbon - 12.

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Answer 2

Answer:

An atomic mass number is a whole number because it is the cumulative sum of the total number of protons and neutrons present in an atom, which is represented in the form of integers.