CBI-3 In most metals there are one or two conduction (free) electrons per atom with a total of something like 1026 free electrons in a 10 gram piece of the metal. These electrons are free to move throughout the metal. If a positively charged glass rod is brought near one end of a metal sheet, like in problem CBI-2, electrons move toward the + charges in the rod. In a short time the electrons stop moving and only a few of the 1026 electrons are at the end of the metal closest to the positively charged rod. Why don't all of the electrons go toward the positively charged rod?