Question

which of the following defines the mass number of an atom answers​

Answer 1

Answer:

here's your Answer

Mass of atoms usually determined by the, no. of proton + no. of nutron present in the nucleus.

Answer 2

Answer:

The mass number of an atom is defined as the sum of protons and neutrons present in the nucleus of an atom or it can also be defined as the sum of its nucleons. It is denoted by 'A'.

For ex: Carbon has 6 protons and 6 neutrons in its nucleus so it has a mass number of 12.