Which of the following largely determines an atom's atomic weight?
A) the number of neutrons
B) the number of electrons
C) the number of electrons in the outer shell
D) the number of protons and neutrons

Question

Quizplus · Accepted Answer

The atomic weight of an atom is largely determined by the sum of the number of protons and neutrons in its nucleus, as these particles contribute the most to the atom's mass. Electrons have a much smaller mass and do not significantly affect the atomic weight.

Which of the Following Largely Determines an Atom's Atomic Weight