What is the difference between atomic mass and mass no.??

ATOMIC NUMBER MEANS THE NUMBER OF PROTONS OR ELECTRONS PRESENT IN AN ATOM.WHEREAS THE ATOMIC MASS MEANS THE MASS OF AN ATOM.NEARLY ATOMIC MASS IS DOUBLE IN NUMBER WITH ATOMIC MASS THANKS PLEASE APPROVE THIS ANSWER.

Thanks .. But i asked the difference between MASS NO. and ATOMIC MASS. Anyways thanks.

Atomic Mass # One atomic mass (1u) is defined as exactly one-twelfth the mass of an atom of carbon-12. # Atomic mass unit is denoted by letter `u`. Mass Number # The total number of protons and neutrons present in one atom of an element is known as its mass number. # The mass number of an element is denoted by letter `A`.

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very gud answer..thanks..

Atomic mass is the average of several elements` masses ((the formula is AM = (% abundance)(mass1) + (% abundance)(mass2) +...)) Mass number is just the mass of one element.

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thank u :)