????ix The Humber

Ina neytral atom the number Protons al the atomic numetrons, sarindicates the -number of electrons

Mass number

is the sum berf Aine protons and neutrons

Present in the atom.of ari

of protons of that of within the nucleus of an atom element..Number of Electron = Number of Proton = Zthe number of neutrons can be determined by A-Zn.????????????