Question

definition of atomic number and atomic mass

Answer 1

it is identical to the charge number of the nucleus l. The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons. The sum of the atomic number Z and the number of neutrons, N gives the mass number A of an atom.

Answer 2

Hey mate here is your answer
Definition:1.Atomicnumber =the total number of protons present in the nucleus of an atom .