Question

what is difference between whole mass number and atomic mass number?

Answer 1

Atomic number is number of protons in an atom.

Mass number is number of protons + number of neutrons in an atom.

Answer 2

Hey mate here is your answer,
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Atomic mass is also known as atomic weight. Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes. The mass number is a count of the total number of protons and neutrons in an atom's nucleus.

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