Question

What is the difference between atomic number and mass number?​

Answer 1

The major difference between atomic number and mass number is that the atomic number states the number of protons present in an atom whereas, the mass number indicates the total of the number of protons and the number neutrons present in an atom.

Answer 2

Atomic Number: The number of the protons present in the nucleus of an atom is called atomic number. ... ii) Mass number is the number of protons and neutrons in the nucleus taken together. For example, mass number of sodium is 23 g/mol. iii) Isotopes are elements with the same atomic number but different mass numbers.

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