Subatomic particle that has mass nearly equal to that of a proton, but carries no electrical charge

The answer is the neutron. It is a subatomic particle with no net electric charge and its mass is approximately equal to the mass of a proton. Protons and neutrons constitute the nucleus of an atom and collectively they are called as nucleons.

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.