Atomic Number - The total number of protons in an atom.
Mass Number - The total number of sub-atomic particles inside the nucleus.
Isotopes - These are atoms of the same element with the same number of protons but different number of neutrons.
Relative Atomic Mass (Ar) - This is the combined relative masses of the nucleons in one particular isotope or an average of several isotopes.
Mass Number - The total number of sub-atomic particles inside the nucleus.
Isotopes - These are atoms of the same element with the same number of protons but different number of neutrons.
Relative Atomic Mass (Ar) - This is the combined relative masses of the nucleons in one particular isotope or an average of several isotopes.