Question

why is the atomic mass number is a whole number

Answer 1

atomic no. ka double
or in few element double+1
hope you understand

Answer 2

Hlw mate here is u r answer...... ♥♥♥♥♥
because the atomic mass reported on a periodic table is the weighted average is all the naturally occurring isotopes.....
Bring an average it would be must unlikely to be a whole number....
the mass of an individual atom in atomic mass units is the mass relative to carbon.....
hope it helps uuu......
be brainly... ♥♥♥♥♥