Physics Standard Model explanation
Just to explain Standard Theory a little more.
Electric charge = Photon - EM field
Strong Nuclear Force = Gluon - ? (called color)
Chromodynamics - the wave pattern of the gluon that becomes the quark and antiquark and back and forth. It is the dance of gluons, quarks and antiquarks inside the proton that create this fundamental piece of matter we know. It is the Gluons exchanging between the protons and neutrons in the nucleus that form the strong nuclear force that keep the nucleus of an atom together.