The mass number of an atom of carbon (C) represents the total number of protons in the atom. neutrons and electrons in the atom. protons and neutrons in the atom. electrons in the atom.
Answer: The mass number of an atom of carbon (C) represents the total number of protons in the atom. neutrons and electrons in the atom. protons and neutrons in the atom. electrons in the atom.
Well, protons and neutrons are the largest particles in an atom. Electrons are not included in the mass because they are too small to make a difference in the mass.
