Atomic weight is determined by the number of:
A) protons and electrons.
B) neutrons and electrons.
C) neutrons, protons, and electrons.
D) protons and neutrons.

Question

Quizplus · Accepted Answer

Atomic weight is determined by the number of protons and neutrons in an atom's nucleus. Electrons do not significantly contribute to atomic weight, as their mass is much smaller than that of protons and neutrons.

Atomic Weight Is Determined by the Number Of