The number of particles in an atom of the element base shows a nuclear symbol, by number, with the mass of the Proton is with neutron and atomic number is the number of protons.
The number of elementary particles in atoms is shown by the nuclear mass number is the total number of protons and neutrons, and atomic number is the number of protons.
The elementary particles in atoms is shown by the nuclear mass number is the number of symbols by protons and neutrons and atomic number is the total number of protons.