Charge -- what is it? Analogous to understanding of gravity in the days before Einstein, I know the effects of Charge and can even feel it, but have no idea what it is. Well, I know electrons are negativly charged and protons positively. I know the effects of charges; atoms with excess of electrons are negative ions and deficiency plus ions. I know like charges repell and counter attract. Apparently charge is a Force that can be expressed as derivation of basic equation F=ma (one would think) since, given sufficient coulombs of force, C, it can move a mass, m. I even gamble to say that there is a conservation of charge too. I guess these are well defined observations but still I am at a loss what charge is. Therefore I put you guys in charge, :tongue:, of helping me understand. I put together these questions and if someone answers them I think I will be closer to understanding it; 1) What properties of electrons lends them a minus charge 2) What properties of protons lends them plus charge. 3) Can it be shown that neutral particles such as neutrons lack these properties. 4) How is a charge transmitted (what is electromagnetic force made out of better question?) 5) The strong nuclear force prevents protons from blowing appart the atom; but likewise, what is keeping the many electrons from doing same (why don't electrons throw each other out of orbit?). I know of coulomb force of attraction but I would think that it alone can not produce needed forces. One would think there would also need to be angular velocity, centripetal force, to create equilibrium, else electron would fall into nucleus. But would this imply electron is a particle or can a wave also have angular velocity? Those are my questions about Charge I hope it's not to many. Thanks!