Question

3 multiple choice 1 point the total of the number of protons plus the average number of all the neutrons is known as _______. atomic mass atomic number

Explanation:

To solve this, we recall the definitions: Atomic number is the number of protons. Atomic mass (or atomic weight) is the sum of protons and the average number of neutrons (since protons and neutrons contribute to the mass of an atom, and electrons have negligible mass). So the total of protons plus average neutrons is atomic mass.

Answer:

A. atomic mass