Part 1 1] In or er for two particles to feel electrical attraction or repulsion, they must possess a mass b quantum wavelength C charge d quarks 2] Put an \"x\" by each entry below that will either attract or repel each other. a proton b neuhnn c electron 3] A neutral atom is one that contains a the same number electrons as neutrons. b the same number of neutrons as protons c the smile number of protons as electrons