My spidey-senses tell me that they probably would attach themselves to the next possible atoms, turning them into Ions witha negative charge, just because every atom except for a certain group of elements called "Edelgase" in german) can use some electrons and they don't like flying around all alone either. I don't know any of the words needed to properly explain this though, and I could be horribly wrong. But that's what me spidey senses told me.