The mass of the most common isotope of an element is known based on an element's

A.mass number
B.average atomic mass
C.atomic number
B.number of electrons

Respuesta :

Answer:

A.mass number

Explanation:

-Mass number is the number of nucleons in the atom's nucleus.

-Different's isotopes have different mass numbers.

-The isotope with the highest mass number is the most common isotope.

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