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Difference Between Mass Number and Atomic Number (with Comparison Table)

The atomic number is the number of protons in an atom's nucleus and defines the element, while the mass number is the total of protons and neutrons. Both n

TL;DR: The atomic number is the number of protons in an atom's nucleus and defines the element, while the mass number is the total of protons and neutrons. B…

By Syllab.in · Updated Jun 17, 2026

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