The following statement I have found in a book: Between an apple and the Earth, gravity dominates because both the apple and earth are electrically neutral, to a high precision. Matter is neutral to a better part than 1 in 10^20 in order for the electric force of repulsion between the apple and earth to be similar to the gravitational force between them, only 1 atom in 10^20 would have to lose an electron. So to make an apply about the earth float, we need them to lose an electron each? Does this make sense? How much energy does it take to lose an electron, and can this be accomplished?