The atomic number and mass number corresponds to the number of electrons and protons in a specific element, while the atomic number and mass number corresponds to the number of nucleons(protons and neutrons) in a specific element.
What is atomic number and mass number?
The number of protons in the nucleus of each element's atoms, represented by the symbol Z, is the element's atomic number. The sum of the protons and neutrons in an element's nucleus is known as the mass number (A).
Thus, atomic no. is the count of electrons or protons in an element whereas, atomic mass or weight refers to the no. of nucleons that is the sum of protons and neutrons in the nucleus of the element.
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