The mass of an atom is primarily determined by its protons and neutrons, which are collectively known as nucleons. While electrons do contribute to the overall mass of an atom, their mass is negligible compared to that of protons and neutrons. Protons and neutrons are found in the nucleus of the atom, and their combined mass accounts for nearly all of the atomic mass. The number of protons in the nucleus also determines the atomic number and thus the identity of the element.
Which subatomic particle determines the mass of an atom?
1 answer