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How do you compare atomic mass and atomic number and mass number?

In: Chemistry, Nuclear Physics, How-To, Elements and Compounds [Edit categories]

Answer:

Atomic mass is the average masses of all the isotopes known for that element as they occur in earth's nature.

Atomic number is the element's identity, the number of protons the nucleus has, will never change.

Mass number is [NOT ~~just another way to say atomic mass~~.]
Added:

Mass number is equal to the number of protons AND neutrons, that is of ONE particular isotope of an element. This is a round figure, not an average like atomic mass.

First answer by Isntphysicsfun. Last edit by JoppeDeQuint. Contributor trust: 170 [recommend contributor ]. Question popularity: 2 [recommend question].

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