Question

what is meant by atomic mass number?

Answer 1

Hey there ! ☺✌

The mass no. , also called atomic mass no. or nucleon no., is the total no. of protons and neutrons in an atomic nucleus. The mass number is different for each different isotope of a chemical elemen.

Hope it helps you ! ✌✌

Answer 2

hiii mate
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hope this help you
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in simple
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atomic mass number =no. of proton+no.of neutron