Hey guys I'm a new member and I will be mostly asking questions :P Anyways ... Physics subjects in my school are about electricity now and my teachers aren't very good, so I can't clearly understand what they're saying. To get to the bottom line, our lesson was about electrons and electricity. I understand that when I rub a ruler on my hair - for example - it would be charged and therefore it can attract scraps of paper. My questions are : 1.Where do electrones go in the ruler ? 2.Free electrones that conduct electricity, does the atom need them ? if not then why did the atom take them in the first place ? 3.Non-conductive materials such as wood, as I understood they don't conduct electricity because their atoms need to be filled with electrones so they can be stable, is that right ? If so, are atoms in the Non-conductive materials unstable ? and shouldn't they after awhile of charging they will be full and will therefore conduct electricity ? 4.Some materials when rubbed will get positive charges and some will get negative, why ? 5.After charging a ruler it would attract for a few minutes then it will stop, why ? Could someone please explain everything to me ? Thanks.