The atomic mass is equal to the _____.

Question

A
number of protons

B
number of neutrons plus protons

C
number of electrons

D
number of protons plus electrons

Answer 1

The atomic mass is equal to the B number of neutrons plus protons.

Atomic mass is a weighted average of the masses of an element's isotopes and is primarily determined by the number of protons and neutrons in the nucleus, since electrons have a negligible mass compared to protons and neutrons.