Atomic signs.
Two atoms were sitting in a bar having some drinks and chatting.
1st Atom: Good grief, I just lost two of my electrons!
2nd Atom: Are you sure?
1st Atom: Yes, I'm positive.
2nd Atom: Well then, where did they go to?
1st Atom: They attached themselves to you!
2nd Atom: Oh no they didn't! Oh NO they didn't!
1st Atom: You see? You're too negative!