What is atomic mass equal to?
A) the sum of the neutrons and protons
B) the sum of the neutrons and isotopes
C) the sum of the neutrons and electrons
D) the sum of the protons, neutrons, and electrons

Question

What is atomic mass equal to? 
A) the sum of the neutrons and protons 
B) the sum of the neutrons and isotopes 
C) the sum of the neutrons and electrons 
D) the sum of the protons, neutrons, and electrons

Quizplus · Accepted Answer

Atomic mass is equal to the sum of the neutrons and protons in the nucleus of an atom. It does not include the electrons, which have a negligible mass compared to the protons and neutrons. Isotopes may have different numbers of neutrons, but the atomic mass listed on the periodic table represents the weighted average of all the isotopes of an element.

What Is Atomic Mass Equal To