Question

what number equals atomic mass

Answer 1

Answer:

The total number of nucleons - protons and neutrons - in the nucleus of an atom is called the Mass Number.

Explanation:

.Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes.

Answer 2

Answer:

The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

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