Question

what is atamic mass number? state it's symbol​

Answer 1

The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.

Explanation:

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Answer 2

Answer:

atomic mass number is also called mass number. mass number is the total number of neutrons and protons in a nucleus. the atomic mass of atom is expressed in atomic mass units.

symbol A