> Speaking of the subject, did you guys hear the one about the two hydrogen atoms who went for a walk? As they're walking, one stops and says to the other, "Oh, I've just lost an electron."
>
> "Are you sure?" asks the friend.
>
> "Yeah, I'm positive."

That reminds me about the drill sergeant that got all up in some poor private's face and shouted, "DO YOU KNOW WHAT THE CHARGE OF AN ELECTRON IS???" and the private quivered and said, "Sir, n-negative, sir!" and -- here's the funny part -- the drill sergeant didn't know if he didn't know or gave the right answer!