Respuesta :
protons only
neutral has no difference on the mass
but to be safe i don't know about electrons
positive protons is one tho
Answer:
protons and neutrons
Explanation:
The masses of the protons and neutrons in an atom contribute to nearly all the mass of the atom. The electrons have negligible mass so it is ignored. The mass of a proton is 1.6726219 × 10⁻²⁷ kilograms. The mass of a neutron is 1.660540 x 10⁻²⁷ kg. The mass of an electron is 9.10938356 × 10⁻³¹ kg. The difference in the masses can be clearly seen.
